Kesha, who was preparing for a live performance at Sunday's Billboard Music Awards, is no longer performing at the show after Dr Luke's record label "rescinded its approval".
Dick Clark productions said in a statement on Tuesday that Kesha initially accepted its invitation to perform at show on May 22 and "received written approval from Dr Luke's record label, Kemosabe Records". But the label "rescinded its approval following a media report on Wednesday May 11´´, the statement continued.
Dr Luke - real name Lukasz Gottwald - and Kesha have been at war since she accused of him of drugging, sexually abusing and emotionally tormenting her while working together on many of her biggest hits.
The New York Daily News reported that Kesha had planned to take a swipe at Dr Luke during her performance, however the Tik Tok singer denied this on Instagram, saying she was planning a cover of Bob Dylan's It Ain't Me, Babe.
Writing that she was "very excited to perform a tribute" to Dylan, she continued: "I'm very sad and sorry to say I won't be allowed to do this."
She explained: "I just wanted to make very clear that this performance was about me honouring one of my favourite songwriters of all time and has never had anything at all to do with Dr Luke.
"I was never going to use a picture of him, speak of him or allude to my legal situation in any way.
"I simply wanted to sing a song I love to honour an artist I have always looked up to. Thank you all for the continued support."