VIDEO: Sneak Peek - Criss & Ushkowitz Go 'Gangnam Style' on GLEE

Darren Criss, Jenna Ushkowitz and Kevin McHale decided to go 'Gangnam Style' to say 'thank you' to their loyal GLEE fans. To make up for the long break between airings of original episodes of the FOX musical dramedy, the actors gave a behind-the-scenes peek at the musical number airing November 8th which they are currently working on. Check it out below!