In Jimmy's office before the show, Christina Aguilera, Jimmy, and The Roots grabbed some office supplies and used them as instruments to perform Christina's "Your Body." (Instrument list below) Christina Aguilera - vocals, stapler Jimmy Fallon - iPhone keypad Questlove - coffee pots with pencil drumsticks Tuba Gooding Jr. - Scotch tape Frank Knuckles - Poland Spring water cooler jug Captain Kirk -