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Taylor Swift attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
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Jennifer Lopez attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
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Kendall Jenner wearing Balmain x H&M attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
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Kylie Jenner attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Steve Granitz/WireImage)
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Rita Ora attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
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Iggy Azalea attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
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Mariah Carey attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Steve Granitz/WireImage)
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Britney Spears attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Steve Granitz/WireImage)
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Zendaya attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Steve Granitz/WireImage)
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Actress Hailee Steinfeld attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Steve Granitz/WireImage)
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Meghan Trainor attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
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Charli XCX attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Steve Granitz/WireImage)
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Chrissy Teigen attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
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Model Olivia Culpo attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
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Singer Idina Menzel attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jeff Kravitz/BMA2015/FilmMagic)
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jennette-mccurdy-billboard-awards-2015
Jennette McCurdy attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Steve Granitz/WireImage)
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bailee-madison-billboard-awards-2015
Actress Bailee Madison attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
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Actress Laverne Cox attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Steve Granitz/WireImage)
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Actress Danica McKellar attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
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TV personality Giuliana Rancic attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
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scarlett-leithold-billboard-awards-2015
Model Scarlett Leithold attends the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Steve Granitz/WireImage)
