Demi Lovato, Nick Jonas walk the red carpet for Jingle Ball in Sunrise, Fla. (21 images)

Chart topping artists including Demi Lovato and Nick Jonas came together to perform for the Y100 IHeartRadio Jingle Ball 2017 concert at the BB&T Center in Sunrise, Fla., on Sunday. Photos by Gary I Rothstein/UPI

Demi Lovato walks the red carpet. Earlier this year Lovato was named a Global Citizen ambassador for mental health who will focus on vulnerable communities around the world including Iraq. | License Photo
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