Songfacts®:

• This sadistic song is about an abusive relationship which the victim finds "irresistible." Bassist Pete Wentz said it reminds him of a scene involving Sex Pistols bassist Sid Vicious and his girlfriend Nancy Spungen in the 1986 biopic Sid & Nancy. "When I think of 'Irresistible' it brings this image to my head, whether it's fictional or real, of Sid and Nancy in an alley, garbage raining down on them in an eternal spiral of romance and poison," he explained. "Sometimes it's hard not to love what can hurt us the most."
• Pete Wentz told Kerrang!: "I'm particularly attracted to people that probably have the ability to hurt me, but hopefully they don't."
• Initially released as a promotional single for American Beauty/American Psycho in early 2015, the song was re-released in a remixed version later in the year with additional vocals by Demi Lovato.
• The original video, posted in February 2015, shows the band playing a hapless game of basketball. In January 2016, Fall Out Boy released a new music video for their remix of "Irresistible" featuring Demi Lovato. The clip is an homage to the Toy Story narrative of the 'N Sync clip for "It's Gonna Be Me." In this instance, Fall Out Boy and 'N Sync both exist in the same store as figurines, but the Fall Out Boy dolls are unwanted.
  
  The video is directed by Wayne Isham, the guy who helmed the "It's Gonna Be Me" visual. It features cameos by the boy band's Chris Kirkpatrick (as an assembly line worker) and Joey Fatone (as an employee in the toy store). Lance Bass also tweeted his approval.
  
  The band wrote in a post: "I was looking back at the video for 'It's Gonna Be Me' - where they come to life as dolls - and we thought was there an analog to this story. Like somewhere in that same store was there a dollar bin full of toys that no one really wanted that would band together like the misfit, offbrand little outsiders they were.
  
  The toys no one ever wanted come to life. Where would our band have fit in that story? We called up Wayne Isham, the director who did the original video (as well as some of our other favorite Mötley Crüe and Metlallica videos), and pitched ideas back and forth.
  
  Before long we came with the treatment - and were lucky enough to get a few cameos from the original source; as well as our partner in crime on the song Demi Lovato."
• Wentz told Kerrang! how the song grew out of the band's desire to explore new territory - and how it all started with Drake. "A Drake song had come out with a heavy horn intro, and when me and Patrick talked about it, he said he had a song with a similar vibe. That's where it came from originally. He cut the demo track somewhere random in the UK on a day off. Hearing it for the first time I was like, 'It's like old Fall Out Boy with new Fall Out Boy production,' which is an interesting take," he explained.
  
  "With American Beauty we were trying to make a record as quickly as possible and this song fit right in. We talked about what would be counterintuitive for a Fall Out Boy song at that time, and it seemed like having like a different perspective within the song made sense. That was when we talked about Demi Lovato singing on it. Me and Patrick went to the studio in Hollywood and she is singularly one of the most talented vocalists that I've ever met. She was done in one take."