The gods of Rock and Roll have demanded blood and they will not be denied!
Apparently, their feud began when someone on Reddit suggested to Will that he looked like Chad, and then Will said that no, Chad was a character he created.
Gauntlet equals thrown.
Well, on the Tonight Show starring Jimmy Fallon the two engaged in a drum-off for one purpose and one purpose only: to publicly shame their rival in front of millions.
Oh, and it was also done for charity, too. And there's also some cowbell.
Ch-ch-check out the two go crazy on the drums (above)!!!