You probably never thought that R. Kelly and Barbershop Quartet could be used in the same sentence, but Jimmy Fallon will have you thinking twice after you watch this video from 'The Tonight Show.'

Listen to Fallon and 'The Ragtime Gals' catchy rendition of 'Ignition,' and it will be stuck in your head for days. This cheery version of the song, along with the dapper outfits Fallon and the group are wearing will leave you laughing.

It seems that Jimmy Fallon is off to a great start with hosting 'The Tonight Show.'