For those of you who don't know who Keenan Cahill is, he's a teenager who loves lipsynching to popular songs and putting them on youtube. Now some GLEE cast members join his many famous fans getting in on the act.
Katy Perry has released the full video for "Last Friday Night" - and as reported, it's full of surprising cameos... Most notably, "Friday" teen phenom Rebecca Black, Darren Criss, and Debbie (Deborah?) Gibson and Corey Feldman as her parents.