For years, singer Courtney Love has denied allegations that she used heroin while pregnant with her daughter Frances Bean.

Courtney, widow of Nirvana frontman Kurt Cobain, has now admitted that the claims are in fact true.

Back in 1992, a Vanity Fair writer slated Courtney in an article, saying she had openly used heroin during her pregnancy. At the time, a statement from Kurt and Courtney strongly denied this was the case, saying their main priority was to have a "healthy baby."

The two stars temporarily lost custody of Frances as a result of the controversy, and Courtney even blamed Vanity Fair writer Lynn Hirschberg for Kurt's eventual suicide in 1994

However almost 23 years later, Courtney has revealed the allegations were valid. Speaking in a new documentary about Kurt Cobain which premiered at the Sundance Film Fesitval this week, Courtney said, "I used it once then stopped. I knew she would be fine."

The documentary's director Brett Morgen said he was keen to include the admission in the film as the original controvsery had affected Kurt's life so much. "Yeah, they were junkies but they weren't hurting anyone, and the article really had a huge effect on Kurt’s psyche," said Brett. "I don’t think he ever recovered from it, because they took his child away."