Singer Billie Joe Armstrong explained to Q magazine May 2009 that “‘Christian’s Inferno’ is like a subway ride to hell and you kind of end up in outer space with this” song. Bassist Mike Dirnt added: “It’s the most unapologetic love song.” This song is a piano-led number. Armstrong learned the piano before recording 21st Century Breakdown and a lot of the songs were written on it. Bassist Mike Dirnt told The Sun April 24, 2009: “There are parts of this record, which are the most melodic thing we’ve ever written.”