Demi Lovato Performs with 'American Idol' Girls - Watch Now!

Demi Lovato belts out a song while performing during the season thirteen finale of American Idol on Wednesday (May 21) at the Nokia Theatre L.A. Live 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.