In 2014 celebrity lookalikes Will Ferrell and Chad Smith of the Red Hot Chili Peppers had their first drum-off. In a battle played for laughs, Will was crowned champion by Jimmy Fallon and took home a golden three-foot tall cowbell.

So this year they planned a rematch with proceeds to benefit Cancer For College and the Silverlake Conservatory, the two men’s favorite charities. Last Friday night Chad and Will got it on again at the Shrine Auditorium in Los Angeles. This time they brought ringers–stand-in competitors such as Taylor Hawkins (Foo Fighters), Tommy Lee (Motley Crue), Stewart Copeland (The Police), Mick Fleetwood (Fleetwood Mac), Fred Armisen (SNL), Josh Freese (Devo) and of course…Will Ferrell on cowbell. Will even brings out some more surprise guests from his alma mater, Southern Cal. Take a look: