Demi Lovato Debuts 'Nightingale' During 'GMA' Concert Series

Demi Lovato rocks hot pink lipstick with her new purple hair during the Good Morning America Concert Series in Central Park, New York City on Friday morning (June 6).

“Can’t wait to play @GMA Concert Series in Central Park tomorrow!!! Who will I see there?! 😝�’�😃 #DemiOnGMA,” the 21-year-old musician tweeted just the night before, anxious about her performances.

PHOTOS: Check out the latest pics of Demi Lovato

Cher Lloyd, 20, made a surprise appearance with Demi on stage for their duet, “Really Don’t Care”, and Demi also performed “Nigthingale“, “Heart Attack” and “Neon Lights”. Watch them all below!

FYI: Demi is wearing the Naomi heels by Ruthie Davis, Dion Lee jacket, FRAME Denim pants, AS29 necklace, Loree Rodkin rings, and Lynn Ban cuffs and rings. Cher is wearing an AS by DF jacket.