A Justin Bieber song titled “Faithful” didn’t make the cut when it was time to drop 2015’s Purpose, the pop star’s fourth studio album, but it’s certainly making headlines now. Audio of the unreleased song has circulated online, and now a producer on the track says Justin had on-again, off-again girlfriend Selena Gomez on his mind when he worked on the track.

“I’m not 100% sure [it’s about Selena], but they were going through a tough time when he wrote it,” Timothy ‘BOS’ Bullock tells Hollywood Life. “You have to ask Justin.”

This isn’t the first time BOS gave us the skinny on “Faithful.” If screenshots posted to Bieberpedia are to be believed, the producer told Instagram users Justin was “venting about Selena” and the song was “one of his favorites.”

The timing of this song leak is funny, considering Justin just attended Selena’s house party on Oct. 22 — but this time, they were hanging out just as friends. An insider exclusively told Life & Style Justin reached out when he heard about Selena’s kidney transplant.

justin bieber and selena gomez

“He was shocked,” the source said. “He called [Selena’s mom] Mandy [Teefey] to find out what was going on, and said he wanted to be there for Selena. Justin told Mandy he’s truly sorry for the way he treated Selena when they were dating and that he’s grown up a lot since then.” Another source added, “[Selena is] happy something positive came out of this awful situation with her kidney transplant. It’s brought her and Justin back together again.”

But was Justin actually as faithful as he claims in this song? Well… perhaps we should let bygones be bygones.