Ashton Kutcher Sings Katy Perry's 'Teenage Dream' at Teen Choice Awards!

Ashton Kutcher accepts an award on stage at the 2011 Teen Choice Awards on Sunday (August 7) at the Gibson Amphitheatre in Universal City, Calif.

The 33-year-old actor picked up the award for Choice Movie Actor in the Romantic Comedy category for his work in the film No Strings Attached.

During his acceptance speech, Ashton broke out into song with Katy Perry‘s “Teenage Dream,” but was shooed off stage after going on for too long!

Ashton recently went to work on the show Two and a Half Men. The cast just filmed the first episode of the new season.