I Write Sins Not Tragedies is the second single from Panic! At The Disco's debut album. It was released on compact disc and 7 inch vinyl, on April 27, 2006. The song was written by the band's guitarist, Ryan Ross. Despite reaching #7 on the United State's Billboard Hot 100 and having a significant radio airplay, it was only #25 on the UK Singles Chart. Until the release of "Hallelujah" in 2015, this was the band's only top forty hit.
In response to the lyrics "The poor groom's bride is a whore" and "Haven't you people ever heard of closing the goddamn door?", many U.S. radio stations changed "whore" with a "shhh" sound, and the "god" in "goddamn" was removed. Some stations generally dedicated to modern rock still play the original version.
The song was covered by Fall Out Boy, fellow Decaydance band, for their live album, ****: Live in Phoenix, and commonly uses the song's chorus as a lead-in to "This Ain't a Scene, It's an Arms Race" in concert.
"I Write Sins Not Tragedies" was ranked #3 in Billboard's Best 2000's Video poll.