Hell, by the time the song was finished, I'd even managed to win over the lead singer dude and he suggested that I sing a second song! (And I don't even remember what song it was - only that I knew it even less-well than the Lit song).
So after a few songs, the band, (who I've since found out is called Drunk Uncle Bob) took a break. I pulled the singer aside and this time I managed to convince him to let me sing a song! Then after he agreed to let me do it, it almost didn't happen because I didn't know most of the songs in the bands repertoire. In the end I managed to convince him that I sorta knew the words to My Own Worst Enemy by Lit and that I'd be able to wing it. Check out the singer's expression: totally annoyed because I'm messing up the words. Hahah.