Here's something that will no doubt get Glee fans singing a happy tune.
The news comes just three days after Lovato's involvement with the program was announced.
"Demi and I have been friends for years, and I'd like to thank her for letting me in on the fun cohosting Teen Choice 2012," McHale said in a statement. "It's exciting to finally be working together professionally, and I'd like to welcome her to the Fox family. This is going to be a great show."
Lovato and McHale will be overseeing a show that is scheduled to feature appearances by the likes of Miley Cyrus, Lea Michele, Josh Hutcherson, Zac Efron, Taylor Swift and Selena Gomez, as well as performances by No Doubt, Justin Bieber, Flo Rida and Carly Rae Jepsen.
The Teen Choice Awards 2012 airs Sunday, July 22, on Fox.