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.

Watch! JLo sings about tight pants with Fallon

Matthew McConaughey looked ridiculous in 'tight pants' sketch with

Matthew McConaughey looked ridiculous in 'tight pants' sketch with

I gotcha, hot Sriracha Tight pants, Jennifer lopez, Jennifer

Jennifer Lopez & Jimmy Fallon - 'Tight Pants

Jennifer Lopez Stuns in Same Risky, Double-Slit Dress as Kendall

Jennifer Lopez Bashed For Singing In 'Anti-Gay' Dubai For $5 Million

CHVRCHES Perform “Over”!, performance, Chvrches

J.Lo And Jimmy Fallon's Charade Dance Battle Is Epic

Watch Jennifer Lopez Scares the Tight Pants Off Jimmy Fallon

Tight Pants w/ #WillFerrell #FallonTonight