There are very few things sexier than R. Kelly's performance of 'Ignition (Remix).' Jimmy Fallon performing it with the Barbershop Quartet definitely isn't one of them, but it is funnier.

Fallon follows up the 'Evolution of Hip-Hop Dancing' in the first episode of his 'Tonight Show' hosting duties with a warmly sung rendition of the hit song with the Ragtime Gals. Instead of a performance featuring mink coats, basketball jerseys and scantily-clad women, we get Fallon and friends in striped suits and bow ties. It's a fair trade-off, no?

The late-night talk show host is only two episodes into his tenure on 'The Tonight Show' and he's already reached heights of hilarity that his predecessor, Jay Leno, struggled with over the past few years.

We wonder what Fallon and the Roots have in store next?