Demi Lovato at the 2013 Teen Choice Awards at the Gibson Amphitheatre in Universal City, CA on August 11, 2013.

Demi Lovato arrives at the Fox All-Star Summer 2013 TCA Party at the SoHo House in West Hollywood, CA on August 1, 2013.

Demi Lovato at the 2013 MMVA’s (MuchMusic Video Awards) in Toronto, Canada at the MuchMusic Headquarters on June 16, 2013.

Demi Lovato signs copies of her new album “Demi” at HMV Oxford Street in London on May 28, 2013.

Demi Lovato attends the 2013 Wango Tango concert produced by KIIS-FM at the Home Depot Center in Carson, CA on May 11, 2013.

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

Zendaya Coleman at the “You Again” Los Angeles Premiere at El Capitan Theater in Hollywood, CA on September 22, 2010.

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

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.