Recording artist Kesha attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Christopher Polk/Billboard Awards 2014/Getty Images for DCP)

Actress Lucy Hale attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Christopher Polk/Billboard Awards 2014/Getty Images for DCP)

Actress Sarah Hyland attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Bryan Steffy/Billboard Awards 2014/Getty Images for DCP)

Model Christine Teigen attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Kevin Mazur/Billboard Awards 2014/WireImage)

Singer Carrie Underwood attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Kevin Mazur/Billboard Awards 2014/WireImage)

Recording artist Jennifer Lopez attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Christopher Polk/Billboard Awards 2014/Getty Images for DCP)

Singer Nicki Minaj attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images)

Musician Fred Durst attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Bryan Steffy/Billboard Awards 2014/Getty Images for DCP)

Rapper 2 Chainz attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images)

Singer Shakira arrives at the 2014 Billboard Music Awards in Las Vegas, Nevada May 18, 2014. (Photo by L. E. Baskow/Reuters)

Singer Ricky Martin attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Kevin Mazur/Billboard Awards 2014/WireImage)

Rapper Iggy Azalea attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Kevin Mazur/Billboard Awards 2014/WireImage)

TV personality Kendall Jenner attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Bryan Steffy/Billboard Awards 2014/Getty Images for DCP)

Singer Kelly Rowland attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Bryan Steffy/Billboard Awards 2014/Getty Images for DCP)

TV personality Kylie Jenner attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Bryan Steffy/Billboard Awards 2014/Getty Images for DCP)

Singer Natasha Bedingfield attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Kevin Mazur/Billboard Awards 2014/WireImage)

Model Amber Rose (R) and recording artist Wiz Khalifa attend the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by David Becker/Billboard Awards 2014/Getty Images for DCP)

Singer Shania Twain attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Kevin Mazur/Billboard Awards 2014/WireImage)

Singer Miranda Lambert attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images)

Keltie Knight attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Gilbert Flores/Broadimage)

Rosci Diaz attends the 2014 Billboard Music Awards at the MGM Grand Garden Arena on May 18, 2014 in Las Vegas, Nevada. (Photo by Gilbert Flores/Broadimage)