"What's the deal with cell phones?"

It's always great to see Jerry Seinfeld. Since his iconic sitcom went off the air back in 1998, you seem to only see him in reruns, or his funny web series, "Comedians In Cars Getting Coffee", so when he does stand up on a late night talk show, it's a big deal.

On the second night of "The Tonight Show Starring Jimmy Fallon", Seinfeld did 6 minutes of hysterical observations on our obsession with cell phones and took on the post office too.

Lady Gaga never disappoints. She took to the stage to perfrom "ARTPOP"

Throw in a funny bit featuring Jimmy's barbershop quartet, "The Ragtime Gals" and their cover of R. Kelly's "Igniton" and it's a pretty good hour of television.

Fallon's impressive week of guests continues tonight, with Oscar nominee Bradley Cooper and Tim McGraw.