Keenan Cahill has done it again.
After teaming with stars such as 50 Cent, "Jersey Shore's" DJ Pauly D and San Francisco Giants players Cody Ross and Brian Wilson, the teenager is now letting his Gleek flag fly in his latest YouTube video.
Cahill is joined by "Glee" stars Dianna Agron, Darren Criss (and his signature pink glasses), Harry Shum Jr. and Jenna Ushkowitz, who recently wrapped their "Glee" concert tour, in his video for Katy Perry's hit "Last Friday Night (T.G.I.F.)." The cast acts as Cahill's back-up dancers as he lip-syncs.
Cahill also covered Perry's "Teenage Dream," which the singer appeared in the video for.
Cahill, 16, suffers from Maroteaux-Lamy syndrome and has made a name for himself by posting videos on the web in which he lip-syncs to pop hits.
Photo/Video credit: YouTube