"My Girlfriend" is the debut single by the Christian rock band Relient K, released on their self-titled first album.
The song originally appeared as "Marilyn Manson Ate My Girlfriend" on the band's demo album, All Work and No Play.
Thiessen has said that he wrote it because of a female friend, who lived eight hours away in Pennsylvania, who he would talk to about many things including spiritual matters such as where God was taking them in the future.
Thiessen stated "Some moms didn’t want their kids listening to our records and stuff, but that’s expected.
In the end, they rescue the girlfriend after Matt Thiessen defeats Marilyn Manson in a game of rock-paper-scissors.