Songfacts®:

• In "Boyfriend," Ashlee Simpson tells another girl, "You really got it wrong, I didn't steal your boyfriend."
  
  She denied it at the time, saying it's just making fun of how every girl out there sometimes thinks you stole her boyfriend, but on the September 4, 2018 episode of Watch What Happens Live! Ashlee revealed that it was inspired by her relationship with the actor Wilmer Valderrama, who was previously dating Lindsay Lohan. She "was done" with Valderrama by the time she wrote the song, and insisted she didn't steal him away from Lohan.
  
  "I hung out with (Wilmer) first, and I wasn't interested in him at that point," she said. "We're great! All is well! And by the way, they're the best! All the love!"
• "Boyfriend" was the first single from Ashlee Simpson's second album, I Am Me. Before launching her debut album, Autobiography, the previous year, she starred in an MTV reality show that followed along through the making and release. Thanks to exposure on the network, the album shot straight to #1 and sold over 3 million copies.
  
  But by 2005 Simpson was in damage control mode because of fallout from her first Saturday Night Live appearance, where she was caught lip-synching. MTV still supported her, and they pushed the video for "Boyfriend," which ends with her jumping into the arms of Efren Ramirez, who plays Pedro in the movie Napoleon Dynamite. The album again debuted at #1 but sold only about 500,000 copies, and "Boyfriend" stalled at #19. Simpson released one more album before retreating from music, focusing mostly on starting a family.
• Ashlee Simpson told Associated Content about this song: "It's about taking something real life and making fun of it, making it fun. There was some Hollywood drama a couple years ago and I just to hell with it and wrote about what was going on."
• Simpson wrote the song with John Shanks and Kara DioGuardi, her main collaborators on her first two albums. Kara DioGuardi became a household name a few years later when she became a host on American Idol.
• Lindsay Lohan admitted to dating Valderrama when she was 18, and says her 2004 song "Over" is about him. When she heard "Boyfriend," it stung, especially since her co-writers on "Over" were Kara DioGuardi and John Shanks, the same writers who collaborated with Simpson on "Boyfriend."