Always Sunny in Philadelphia fans know about the episode, “The Nightman Cometh,” which features the annoyingly catchy song, “Dayman.” Somehow our bro from Randolph, NJ found the exact t-shirt and pants Charlie wore in the original Dayman video (see below) and recreated the song on a white piano.

With the gut-wrenchingly hilarious “It’s Always Sunny in Philadelphia” kicking off it’s new season tonight, we did what any good fan does, and started looking for clips online. That’s when we came across the episode, “The Nightman Cometh,” which is about a musical written by Charlie. In the musical, they sing the annoyingly catchy song, “Dayman,” which is awesome in its own right. But after a commercial was put together of fans covering the song, YouTube became loaded with clips of people (often badly) covering “Dayman.” Here are the 20 best (or worst, we can’t decide) “Dayman” covers.

With the gut-wrenchingly hillarious “It’s Always Sunny in Philadelphia” kicking off it’s new season Thursday, we did what any good fan does, and started looking for clips online. That’s when we came across the episode, “The Nightman Cometh,” which is about a musical written by Charlie. In the musical, they sing the annoyingly catchy song, “Dayman.”