Mo Gilligan hosts as Grey's Anatomy's Camilla Luddington and Chris Carmack take on Pussycat Doll Kimberly Wyatt and comedian Gina Yashere as they face some supersized musical challenges.

Mo Gilligan hosts TV's biggest music game show. This week, Drag Race stars Courtney Act and The Vivienne take on TV legend Ricki Lake and top musical comedian Reggie Watts as they face some super-sized musical challenges, pushing their singing abilities, performance skills and musical knowledge to the limit.