In Canterlot, Spike was at a music studio sitting in a chair while on stage Sapphire Shores was performing a dance number while wearing a tight leotard. Spike watched in content as Sapphire danced with her tight leotard hugging her curvaceous figure. With every sway and shake of Sapphire's body, her boobs and booty shook along with her. This sight was causing Spike to develop a hard on which he was trying his best to conceal.

When Sapphire finished, she winked flirtatiously at Spike who blushed and applauded like a fan boy, "Awesome job, Sapphire! You got the moves! Among other things." he said silently to himself.

"Well, thank you, honey," Sapphire came down from the stage, and sat herself in Spike's lap before feeling something under her butt, "Mm, I do have that affect on boys. Especially you."

Spike chuckled sheepishly, "Yeah, ya do."

"So why did ya come all the way here, Spike? Can't be just for a free show." Sapphire said.

"Actually, I was thinking about what you said about getting wider audiences." Spike answered.

"Oh?"

"You said you would consider putting on a show in my world, and as it so happens I have found an opportune moment for you."

"I'm listening." Sapphire said with interest.

"Well, you remember mine and A.J's pop star friend we told you about?"

"Coloratura?" she asked.

"Yes, though we call her Rara. She's back in town for a concert, and we were wondering if you'd like to join her in a duet?" Spike offered.

"Really?"

"Uh-huh. A.J already talked to Rara about it, and she's all for it. She's curious about how well pop stars from Equestria can perform."

"Well, if she wants to know so well. I guess I'll have to show her myself." Sapphire smirked.

"So you accept the invite?" Spike asked hopefully.

"For you, baby. Anything," Sapphire kissed Spike leaving him red in the face, "Let me just pack a few costumes and I'll be right there." she got off Spike and went back stage to her dressing room.

At first Spike looked shocked, until he began to smile, "Oh yeah!" he cheered, "Sapphire Shores in my world is sure to bring a lot of new fans for her."

"You think she'll work all right with Rara?" Bahamut inquired.

"We'll be there to help." Spike assured him.

Soon enough Sapphire came back wearing casual clothes while carrying a single suitcase, "All set, Spike."

Spike looked Sapphire over seeing her casual attire, composed of white sandals, blue shorts, and a white spaghetti strap top, "How do I look?" she asked, while showing off.

"You look perfect." Spike gave her a thumb's up.

"Thanks. So how're we getting to this world of yours?"

"A little portal magic. After acquiring some of Twilight's magic, she taught the portal spell to Equestria and back." Spike held out his claw that glowed with Twilight's magic aura creating a portal.

"Anything I should know about when I enter your world?" Sapphire inquired.

"You may feel a little different as a human, but it doesn't change who you are," Spike then thought to himself, 'And without a doubt you're gonna look so much hotter.' And with that the two stepped through the portal.

At Spike's place, Twilight and the others were waiting around, until the doors opened and entering was Applejack and Rara in her casual clothes for disguise, "Hey, ya'll. We're here." Applejack greeted.

"Rara, it's good to see you again." Twilight greeted her with a hug.

"It's good to see all of you," Rara replied, as she looked around seeing everyone, but noticed someone special was missing, "Well, those of you here."

"Don't worry, darling. Spike should be here real soon." Rarity assured her, until they saw a portal open up.

"Or right now." Rainbow said.

Stepping out from the portal was Spike and Sapphire. The girls were amazed to see Sapphire's human form. Sapphire looked at herself while admiring her smooth skin while feeling lighter on her behind without a tail. Spike himself looked at Sapphire with a blush on his face on how smokin' hot she looked as a human.

"Ooh, baby. I look absolutely sensational! Ow!" Sapphire cheered.

"I'll say." Spike agreed.

"Spike!" Rara cheered, as she ran over and embraced the boy.

"Rara, good to see you!" Spike said, while hugging her back and enjoying the squishy mounds pressing into his chest.

After the two parted, Rara saw Sapphire and asked him, "Is she the one?"

"That's right," Spike said, as he stood between them, "Rara, meet Sapphire Shores. Sapphire, this is Rara."

The two pop starts shook hands, as Rara spoke, "Nice to finally meet you. I've heard a lot of great things about you from Rarity."

"Feelings mutual, hon," Sapphire replied, while checking her out, "Girl, you are undeniably beautiful."

Rara blushed, before answering, "Thank you. You look amazing too."

"Indeed so." Rarity agreed.

"So, Sapphire, how do you feel?" Twilight asked.

"Well, this new form sure feels different than being a pony that's for sure."

"We've been there." Bonbon admitted on behalf of herself, Lyra, Vinyl, and Twilight.

"But I think I can adapt to it." Sapphire replied.

"Great. So what say we get underway and get you and Rara in some practice." Spike suggested.

"Well, before we begin I think it's best we see how each of us is individually." Sapphire said.

"Good thing I got music from each of your individual performances." Vinyl said, while holding up two CDs.

Soon both Sapphire and Rara were listening to each others music to get a good idea. Both girls were moving their heads to the rhythm clearly enjoying it. After their songs ended, the two took their headphones off, and Sapphire spoke, "Rara, you got the voice of an angel."

"You've got some set of pipes yourself, Sapphire." Rara smiled.

"You both are amazing." Applejack commended them.

"Think you two can work together now?" Spike inquired.

The two pop stars looked at each other and smiled, "I think we can make this duet work." Sapphire answered.

"I'd sure be all for it." Rara admitted.

"Now we just need to see if Sven will actually accept it." Rainbow said.

"Who's Sven?" Sapphire wondered.

"Rara's manager," Spike answered, "That guy was such a control freak always limiting Rara's freedom and trying to cash in on her own fame to make others do what he wanted."

"Oh, there's no need to fret about him, fellas." Applejack replied.

"What do you mean?" Fluttershy asked.

"Sven's history," Rara began, "I fired him weeks ago."

"Fired him?" Pinkie asked.

"I thought you said you fixed things with him." Lyra recalled.

"I did for awhile, but soon enough he went back to the way he was," Rara explained, "Eventually I flat out fired him. He walked off acting like he made me who I was and that I would be needing him. But last I heard of him he was working as a janitor at a Starbucks in Jersey." the girls laughed.

"Suck on that, Sven!" Rainbow laughed.

"And without Sven I've been doing just fine under better management." Rara added.

"Wicked." Vinyl smirked.

Sapphire spoke, "One thing about the pop star life, Rara, is ya have to pick your managers wisely. Otherwise it's nearly impossible to get rid of them."

"Tell me about it." Rara sighed.

"So then, what's say we get started, huh?" Sapphire asked Rara.

"Let's." Rara agreed.

"To the theater room!" Pinkie declared, as they both headed over.

As Spike and his girls were sitting in the theater seats, as Sapphire and Rara were on stage Vinyl was at her turntable mixing beats. Once the two stars got comfortable and relaxed they began singing together.

https://www.youtube.com/watch?v=ZtUJNhKbbx4

As the two stars sang it felt as if they were in perfect sync with each other, and they were having fun with it. While Spike and the girls watched in delight as their two favorite pop stars worked together.

When the two finished, their audience applauded and cheered their hearts out. Spike stood up, "Awesome job, girls! You blew my mind away!"

"Mine too." Pinkie added.

Sapphire turned to Rara, "If we can get this kind of reaction out of them..."

"Imagine the the reactions we'll receive from an even wider audience." Rara realized, and the two performers squealed and hugged while dancing around.

"Well, there will be plenty of time to prepare for that," Twilight said, "In the meantime you're both welcomed to bunk here."

"My house is your house." Spike added.

"Thank you so much, you two." Sapphire said with joy.

"We really appreciate it." Rara agreed.

Later on both Sapphire and Rara were alone in the baths relaxing after a long day of practicing. Sapphire spoke in a soothing voice, "Mm, this is exactly the way to relax after performing."

"I hear ya." Rara agreed.

Sapphire suddenly became curious and spoke, "So, Rara, how did you get involved with our dragon boy?"

Rara looked at Sapphire curiously, before answering, "Well, I actually met him when I was here last on tour. Applejack brought her friends to meet me, and they offered to show me a day of fun by bringing me back here. And I had to get away from Sven before I'd go insane."

"That bad, huh?"

"Worse. While I stayed here I was finally able to relax and have fun like a normal person. And to top it all off, Spike saved my life."

"Did he now?" Sapphire asked.

"Oh, yeah. Sven got possessed by some villain and he attacked my friends trying to get to me. But Spike protected me like the good person he is."

"Won't deny that about him." Sapphire replied.

"He truly shined bright that day. I never met a guy who would to those kind of lengths for me," Rara continued, "That's just about how I fell for him. What about you?"

"I first met him when Rarity brought her friends to meet me at one of my previous concerts. When I got to know him like you did I learned he was a kind and dedicated soul human or dragon. So I wanted to get to know him better personally."

"Personally?" Rara raised a brow.

"After my concert I invited him to my hotel room where she shared a jacuzzi soak together... Wearing nothing." she winked.

Rara gasped, "You mean both of you were all natural?"

"Oh, yes. Haven't you gotten that way with Spike?"

"No!" Rara cried, before calmly explained, "I mean, it was our first time meeting I didn't want to jump into that so quickly."

"True. So what kind of things did you do with him?"

The younger pop star decided to answer, "Well, my first night here A.J invited me to join her to sleep with Spike, but nothing illicit happened. Though I did cuddle with him through the night. He's better than any hug pillow."

"Is he really?" Sapphire asked.

"Yes, he is." Rara confirmed.

"Good to know. What other stuff have you done with him?"

Rara began to blush, "Well, I kinda made him grope my breast."

Sapphire was taken aback by Rara's words, "You let him do that?"

"Well, this was during Sven's possession and Spike said he needed a stamina booster to charge up his power. So I took his hand and made him grope me to power up."

"And I'm guessing it worked?" Sapphire guessed.

"Oh, it worked all right." Rara confirmed.

"So how did it feel to be groped by him?" the older girl asked.

"Strange. I never felt anything like it before. He didn't squeeze so hard it was uncomfortable, but it felt so good." Rara admitted.

"I can believe it," Sapphire agreed, "He groped me too."

"He did?" Rara asked.

"Oh, yes. And I was the one who guided him to it. That boy's got such a good grip I could feel my heart pound." Sapphire swooned.

"Well, if you'd like to know I did other things with him." Rara continued.

"Such as?"

"Well, after the concert and backstage Spike and I kissed which I said was a thank you for letting me stay with him and show me some fun. But for a reward I took his face and smothered him into my bosom." she blushed at the memory.

Sapphire chuckled, "You did that?"

"I did. It felt really good for me too." Rara smiled.

"I know what ya mean, girl. When I asked to see what he looked like as a human I was so wooed by him I had to smother him here." Sapphire patted her bosom making it bounce.

Rara giggled, "Guess we both had the right idea."

"Sure looks that way. Though what puts me ahead of you is, he got to see all of this." Sapphire stood up in the bath displaying her bare body to Rara.

Rara stood up as well, and spoke, "Even if Spike never saw me in the buff, I'm hoping maybe I can make that happen while I'm staying here. Though I can't do it tonight. He's sleeping with Twilight."

Sapphire smiled, "Well, don't you worry, baby. I'll help ya in any way possible."

"You will?" Rara asked.

"Of course. After all, as long as I'm bunking here I may as well look for getting a shot with him as well."

"Then we should try it together." Rara offered her hand to Sapphire.

"Ooh, I love the way you think, Rara." Sapphire clasped her hand with Rara's.

"But we'll worry about that later. Right now let's enjoy our bath." Rara suggested.

Sapphire nodded, as they sat back down in the bath to relax. As they enjoyed themselves, Sapphire kept scooting in closer to Rara, and right when their hips came into contact Rara could feel confused. Before she could respond she suddenly found her right breast get fondled from behind by Sapphire whose arm slinked around her and took Rara's bosom into her hand.

"Sapphire, what're you..." Rara began to protest, but suddenly the massage started to relax her and she succumbed to the good feeling.

"Don't worry, darling. It's just a little comparison between us girls. And you got a winning pair with these girls." Sapphire replied, while fondling Rara's breast.

"Just not so rough ok?" Rara asked while blushing.

Sapphire giggled, as she continued to massage Rara's rack, before leaning close to her ear and whispered seductively, "You smell so good."

Rara's face turned red, and answered still too relaxed from the massage, "Thank you. I am using a new shampoo after all."

Sapphire ceased massaging Rara's bosom and hugged her from behind resulting in her own breasts pressing into Rara's back. Sapphire spoke to her, "Rara, why don't you call me big sister?"

"Why, what brought this on?"

"I just feel like after getting to know you throughout the day I feel like a bond between us and not just as fellow pop stars, but like a sisterly bond," Sapphire explained, "Don't you feel it too?"

Rara blushed, and answered, "Actually, I do feel like that with us. Plus I always wanted a sister."

Sapphire smiled, and kept Rara in an embrace, "Then let's be sisters."

Rara relaxed and answered, "Sounds good to me. Big sister." Sapphire giggled, as she stroked Rara's hair.

After their bath the two had been set up in one of the guest rooms together. Rara was already in her sleepwear like she wore before, being a pair of purple sleep pants and a black camisole top that hugged her contained rack. Sapphire was wearing a pair of blue silk pajamas with the top few buttons of her top unbuttoned allowing plenty of cleavage to be in view.

The two got into bed with Rara on the left side and Sapphire on the right. They laid on their sides looking at each other happily, until Sapphire moved some of Rara's hair out of her face tucking it behind her ear, "Darling, you are so beautiful." Sapphire said.

Rara giggled while blushing, "You're beautiful too, Sapphy."

"Sapphy?" Sapphire laughed.

"Yeah. I have the nickname Rara, so how about I call you Sapphy?"

"I'd love that." Sapphire admitted, while trying to suppress some giggles.

Rara smirked, "There's my Laughy Sapphy." she played with Sapphire's cheeks.

Sapphire laughed, "Now we both got cute nicknames."

Rara spoke, "I would be honored to sing along side you, Sapphire."

"As would I, Rara," Sapphire agreed, before reaching over and pecking Rara on the cheek leaving said girl red in the face, "Just for a little good luck is all."

"Well, in that case." Rara began before Sapphire a peck on the cheek in return.

Sapphire smiled and blushed, "Thanks, sweetie." As Rara was about to fall asleep, Sapphire held wrapped her arms around her head pulling her down into her comforting bosom to sleep on, "Here, let these be your pillows for tonight."

Rara nuzzled into them, "They are comfy."

Sapphire stroked Rara's hair, "Goodnight, Rara."

"Goodnight, Sapphy." Rara replied, as the two pop stars drifted off to sleep.