Keenan Cahill (born March 1995) is a teenager from Elmhurst, Illinois whose lip-syncing of popular songs has brought his videos on YouTube to some of the most viewed online. Keenan has Maroteaux–Lamy syndrome, which in some cases, including Cahill, results in individuals developing a dwarf-like appearance.
In July 2011, Cahill was joined backstage of Glee! Live by cast members Dianna Agron, Harry Shum, Jr., Darren Criss and Jenna Ushkowitz to lip-sync to Katy Perry’s song Last Friday Night (T.G.I.F.).