Jennifer Lopez Performs 'Tight Pants' Song With Jimmy Fallon (Video)

Out promoting her new album "A.K.A.," Jennifer Lopez stopped by "The Tonight Show" and got into a heated sing-off with Jimmy Fallon. The issue? Some very tight white pants.

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Tight Pants with Jimmy Fallon, Will Ferrell & Christina Aguilera

Tight Pants with Will Ferrell, Jennifer Lopez and Christina Aguilera, One town isn't big enough for Jimmy, Will Ferrell, Jennifer Lopez and Christina Aguilera to wear their tight pants. #FallonFlashback