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.

The Tonight Show - The Tonight Show Starring Jimmy Fallon

Tight Pants w/ #WillFerrell 😬 #FallonFlashback Original Air Date

Matthew McConaughey looked ridiculous in 'tight pants' sketch with

Jennifer Lopez Sings About 'Tight Pants' During 'Tonight Show

Jimmy & Matthew McConaughey Rap Their Way Through “Just Because

Matthew McConaughey looked ridiculous in 'tight pants' sketch with

Video] Jennifer Lopez Squeezes Into 'Tight Pants' With Jimmy Fallon

Jennifer Lopez Shows Off Her 'Tight Pants' on Jimmy Fallon

Tight Pants w/ #WillFerrell 😬 #FallonTonight

Tight Pants with Jimmy Fallon, Will Ferrell & Christina Aguilera

Jennifer Lopez shows toned midriff with Jimmy Fallon on The