Young Jimmy Fallon Calls the President a Poopy-Head in New 'Tonight Show' Promo

Amazingly, NBC has yet to screw up the transition from Jay Leno to Jimmy Fallon as host of The Tonight Show. (Give them time, though — it's NBC.) The network released another creative promo for The Tonight Show Starring Jimmy Fallon on Saturday, playing off the idea that Fallon has been preparing to host The Tonight Show since he was a little kid.

What's the best part of this promo? The young Jimmy saying, "So good, so good"? Or The Lil' Roots?