Jade Thirlwall from Little Mix performs inside the London Olympic Stadium in London, UK on July 21, 2013.

Perrie Edwards from Little Mix at the Teen Vogue’s Back-To-School Saturday Kick-Off Event at the The Grove on August 9, 2013 in Los Angeles, CA.

Jesy Nelson from Little Mix at the Teen Vogue’s Back-To-School Saturday Kick-Off Event at the The Grove on August 9, 2013 in Los Angeles, CA.

Cher Lloyd at the 2013 Teen Choice Awards at the Gibson Ampitheater Universal on August 11, 2013 in Los Angeles, CA.

Selena Gomez at the 2013 Teen Choice Awards at the Gibson Ampitheater Universal in Los Angeles, CA on August 11, 2013.

Selena Gomez arrives to the MTV Movie Awards 2013 at Sony Studios in Culver City, CA on April 14, 2013.

Selena Gomez at Nickelodeon’s 26th Annual Kids’ Choice Awards at the Galen Centre in Los Angeles, CA on March 23, 2013.

Miley Cyrus arrives at the “Paranoia” Los Angeles Premiere at the Directors Guild of America on August 8, 2013 in Los Angeles, CA.

Miley Cyrus arrives at the Billboard Music Awards 2013 at the MGM Grand Garden Arena on May 19, 2013 in Las Vegas, NV.

Miley Cyrus at the Elton John Aids Foundation 21st Academy Awards Viewing Party at West Hollywood Park in West Hollywood, CA on February 24, 2013.