This Finally Happened [Video]

Look a likes Will Farrell and Red Hot Chilli Peppers drummer Chad Smith battle it out for "The Worlds Greatest Drummer" on The Tonight Show.

I've been waiting for this and leave it up to Jimmy Fallon to get it done.

Sporting matching black leather jackets, Kiss T-shirts, sneakers and blue  baseball caps worn backwards, Smith and Ferrell took to the couch to talk to Fallon about the history of their feud, each speaking as the other person.

Then the drum off. Then well, wait for it-