The former contestant said that he wrote the track for the N-Dubz star before entering the competition and shocked her during the show by informing her that it was one of his own compositions.
Collins told the Daily Record: "I have always written songs. I wrote a song for Tulisa, which she recorded before she knew me, before I auditioned for the show or anything.
"It was called 'Breakaway' but it ended up not coming out because she got the X Factor job. I think it was going to be her first solo single."
He continued: "She was making a roast dinner for all the groups in the X Factor house and we got talking, then I started singing the song.
"She was looking at me like, really confused, and asked how I knew that song. I said, 'Because I wrote it, love - it's one of mine'.
"We had a laugh about it. I suppose it still could happen. She is in LA right now recording more songs then she's going to Miami to shoot a video so it is all taking off for her."
Collins added: "But I think the songwriters she is working with now are getting a little bit bigger and better than me, she is moving up."
Collins will release his debut single 'Seven Nation Army' in the UK on March 4.
> X Factor Marcus Collins wants Misha B, Adele collaborations
Listen to Marcus Collins's 'Seven Nation Army' below: