Behind the Scenes at the Radio Disney Music Awards with 'Hide Away' Breakout Daya

17-year-old rising star Daya – whose single with the Chainsmokers, "Don't Let Me Down," is climbing the charts – shares her first awards show photo diary with PEOPLE

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"Kelsea and I ready to rock the stage together and perform a legendary mashup of her song "Peter Pan" and my single "Hide Away." We didn't even coordinate the matching sequined dresses and high ponies ahead of time!"