Not since JT joined Jimmy and the Ragtime Gals to make a quintet on an old timey acapella version of "Sexy Back" have we so enjoyed the barbershop quartet schtick on Late Night With Jimmy Fallon.

This, along with the hilarious edit of Brian Williams doing Snoop Dogg's "Ain't Nothing But a G Thang," are why Fallon makes the big bucks, and why he's the obvious choice to replace Leno.

[Laughing Squid]