Several women have accused alternative rock star Ryan Adams of emotional and verbal abuse and offering career opportunities as a pretext for sex.
A report in the New York Times outlines a pattern of manipulative behaviour, including accusations of psychological abuse from his ex-wife, Mandy Moore.
Another woman said Adams sent explicit texts and exposed himself during a Skype call when she was a teenager.
The star, who rose to fame in the early 2000s, has denied the allegations.
“I am not a perfect man and I have made many mistakes,” he said in a statement posted on social media.
“To anyone I have ever hurt, however unintentionally, I apologise deeply and unreservedly.
“But the picture that this article paints is upsettingly inaccurate. Some of its details are misrepresented; some are exaggerated; some are outright false. I would never have inappropriate interactions with someone I thought was underage. Period.”
Acclaimed indie artist Phoebe Bridgers was among the seven women and dozens of associates who were interviewed for the New York Times article.
She said that Adams reached out to her when she was 20, offering to release her songs on his record label. Their relationship turned romantic, but Adams became obsessive and manipulative, she claimed, demanding to know her whereabouts and threatening suicide if she did not reply to his texts immediately.
When she broke off their relationship, Adams “became evasive about releasing the music they had recorded together and rescinded the offer to open his upcoming concerts,” the New York Times reported.
Through his lawyer, Adams rejected Bridgers’ account, describing their relationship as “a brief, consensual fling,” and denying he had threatened to withhold her songs.
This Is Us actress Mandy Moore also described a pattern of abuse, describing instances of “destructive, manic sort of back and forth behaviour” during their six-year marriage.
“Music was a point of control for him,” she added, saying the star had belittled her own musical career.
“He would always tell me, ‘You’re not a real musician, because you don’t play an instrument.'”