Jimmy officiates Will and Chad's battle for the title of greatest drummer on the Tonight Show that ends in a surprise performance of "Don't Fear the Reaper" from the Red Hot Chili Peppers.

Justin Page at Laughing Squid writes:

On a recent episode of The Tonight Show, comedian Will Ferrell and his doppelganger, Red Hot Chili Peppers drummer Chad Smith went head-to-head in an awesome drum-off challenge. The musical battle ended with Ferrell pulling out his secret cowbell attack and the entire Red Hot Chili Peppers band coming out on stage to perform “Don’t Fear the Reaper.”TheReaper) The challenge was initiated during a reddit AMA that Will was taking part in a while back. Will agreed to battle Chad as long as they could raise $300,000 for Cancer For College, which they did.