"Glease" is the third time Glee has featured the high school production of a Broadway musical (John Travolta-starrer "Grease"), following "The Rocky Horror Show" and "West Side Story." Check out the performance videos from this episode.

Glee Boys perform “Grease Lightning”:

Glee Girls perform “Look at Me,. I’m Sandra Dee”:

Melissa Benoist sings “Look at Me,. I’m Sandra Dee”:

Naya Rivera, Kate Hudson Sing “There Are Worse Things I Could Do”:

Darren Criss performs “Beauty School Dropout”:

Glee Cast perform “You’re The One That I Want”:

Videos courtesy of Glee’s Official YouTube Page