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The Angry Birds Movie continues to bolster its impressive roster. Producer John Cohen announced Saturday that Charli XCX will voice a character in the movie, due in theaters May 20, and now pop star Demi Lovato has shared the news that she’ll sing a song on the film’s soundtrack. “Can’t wait for u to hear it and see the movie in May,” Lovato wrote on Twitter, along with a photo of her and 13 of the animated birds.

The Angry Birds Movie‘s cast includes Jason Sudeikis, Josh Gad, Danny McBride, Maya Rudolph, Kate McKinnon, Tony Hale, Keegan-Michael Key, Ike Barinholtz, Tituss Burgess, Bill Hader, and Peter Dinklage. In December, news broke that country musician Blake Shelton will sing and voice a pig in the film.

“It’s really irreverent,” Gad told IGN of The Angry Birds Movie in 2015. “It’s subversive and funny and unexpectedly smart and really beautiful. Actually gorgeous.”