Demi Lovato Sings with the Girls of 'American Idol' (Video)

Demi Lovato rocks out on stage during her performance on the American Idol season thirteen finale at the Nokia Theatre L.A. Live on Wednesday (May 20) in Los Angeles.

The 21-year-old singer started off with her song “Really Don’t Care” before segueing into her hit “Neon Lights.”

Demi was joined on stage by the top girls from this season of Idol – Jena Irene, Jessica Meuse, Malaya Watson, Emily Piriz, Kristen O’Connor, and Majesty Rose.

“Had some really sweet fans say things that I really need to hear tonight.. God, I’m so grateful for you guys. I really do love you. ?,” Demi tweeted this week.