Remember when we showed you an outstanding video from Lakewood High School where they lip-dubbed Katy Perry's Roar throughout their school? Well their efforts paid off, and this morning Katy performed in Lakewood's high school gym live on Good Morning America.

Last week Katy announced that Lakewood High School in Colorado won her contest live on the program.

And this morning she performs for the winning high school dressed as a Tiger cheerleader.