Yoga, Shmoga! Glee's Cory Monteith Pulls a Prank on Ellen

Daytime talk show host Ellen DeGeneres is a fan of pulling pranks, so when Glee cutie Cory Monteith swung by her show on February 18, the Emmy winner asked the talented actor to join in on some silly antics. Hidden cameras followed Monteith backstage in Ellen's studio during a yoga session. Monteith (who was being fed lines by Degeneres through an earpiece) pretended to be an egotistical jerk to his yoga instructor (who wasn't in on the joke)! Take a look at Cory and Ellen's shenanigans below!