Will Ferrell and Red Hot Chili Peppers drummer Chad Smith recently stopped by 'The Tonight Show Starring Jimmy Fallon' to clear up some beef, compete in a drum-off, and oh, just casually dress like twins.

The comedian and drummer -- who seriously look so much alike it's almost impossible to distinguish one from the other in the video -- wore the same old-school KISS shirts, backwards hats and earrings, even pretending to be the other while sitting down for a hilarious interview with Fallon, which you can watch above.

The guys then took their supposed beef to the arena of music, as Fallon set them up to challenge each other to a drum-off. While Smith's drum solos are pretty epic (obviously), Ferrell is surprisingly good himself. But his real talent, as we all know, lies in comedy, as he hilariously teases and taunts Smith after each solo. Check out Ferrell and Smith's drum-off in the video below!