Aly & AJ revealed which song was inspired by AJ’s breakup with Joe Jonas.

The sister duo responded to popular YouTuber Elle Mills’ tweet concerning their hit “Potential Breakup Song.” Mills wrote, “Ok so you’re telling me that i went 13 years not knowing that one of the greatest songs ever written was about Joe Jonas this entire time?”

The Michalka sisters met the Jonas Brothers after they both were signed by Disney's Hollywood Records and then toured together for the first time in December of 2005 on the Cheetah-licious Christmas Tour. AJ even previously admitted that Jonas was her first kiss. They began dating shortly after meeting through November of 2006.

The band's Twitter account replied to Mills on Thursday (April 9) that “Potential Breakup Song” was not written about the middle Jonas brother but rather their song “Flattery” was. The song asks a former flame to stop flattering himself and just admit that he's not okay after a breakup. "I can forgive it, I can't forget it / You left me here with all these scars / And you can't deny the hardest part: I'm not in your arms," the sisters sing in the track.

Although the song portrayed a bad breakup, the sisters and brothers are now on great terms, even attending one another's shows.

See the tweet, below.