Heidi Montag

Heidi Montag blamed Lady Gaga for sabotaging her once-promising music career.

Heidi was working with pop producer RedOne on music, and recorded the track Fashion which was co-written by Gaga.

But after initially agreeing to let Heidi have the song, Gaga took it back to record herself for the soundtrack to 2009 film Confessions of a Shopaholic.

Speaking on the Unpopular podcast, Heidi said: "He was like, 'I just need to get the consent of the writer.' And he was like, 'Hey, I'm gonna cut Fashion with Heidi. I have her in the studio, she loves it.' And [Gaga's] like, 'Great. Sure, she can have that song. So then I recorded it and it was my song. That was the impression I was under.' It's hard because people are like, 'I love Lady Gaga!' And I'm like, 'I'm sure she's great but I have not had the best encounter with her.'"