Will Ferrell and Jimmy Fallon Fight Over Tight Pants, Jimmy Fallon, trousers, Will Ferrell, Tensions are high when Will Ferrell and Jimmy quarrel over whose pants are tighter. #FallonFlashback

Tensions are high when Will Ferrell and Jimmy quarrel over whose pants are tighter. #FallonFlashback

Tight Pants w/ #WillFerrell 😬 #FallonTonight

Will Ferrell and Jimmy Fallon Fight Over Tight Pants (Late Night with Jimmy Fallon)

Tight Pants w/ Will Ferrell 😬, Will Ferrell, trousers, Tight Pants w/ Will Ferrell 😬 #FallonFlashback Original Air Date: 05/10/2012 (Late Night with Jimmy Fallon)

Will Ferrell and Jimmy Fallon Fight Over Tight Pants, Jimmy Fallon, trousers, Will Ferrell, Tensions are high when Will Ferrell and Jimmy quarrel over whose pants are tighter. #FallonFlashback

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

Christina Aguilera, Will Ferrell, and Jimmy Fallon sing about 'Tight Pants' on The Tonight Show

Will Ferrell and Jimmy Fallon tight pants 👖 spoof, but we wear high pants 😂. It's not always so serious herea little break and it's a dance off!!

WATCH: Will Ferrell and Christina Aguilera take on Jimmy Fallon in “Tight Pants”

Tight Pants with Jimmy Fallon, Will Ferrell & Christina Aguilera

Will Ferrell and Jimmy Fallon Fight Over Tight Pants (Late Night with Jimmy Fallon)

Tight Pants w/ Will Ferrell 😬, Will Ferrell, trousers, Tight Pants w/ Will Ferrell 😬 #FallonFlashback Original Air Date: 05/10/2012 (Late Night with Jimmy Fallon)

Will Ferrell and Jimmy Fallon Fight Over Tight Pants (Late Night with Jimmy Fallon)

Will Ferrell and Jimmy Fallon clash over Christina Aguilera's baby in Tonight Show sketch

Will Ferrell and Jimmy Fallon Fight Over Tight Pants, Jimmy Fallon, trousers, Will Ferrell, Tensions are high when Will Ferrell and Jimmy quarrel over whose pants are tighter. #FallonFlashback