Leona Lewis is facing a court battle to release her new single 'Collide'.
The 'Bleeding Love' hitmaker and her record label, Syco, are facing legal action from Swedish dance music producer Avicii who claims 'Collide' copies his track 'Fade Into Darkness'.
He is asking for an injunction on the record, which, if granted, will mean it will not be released on the planned date of September 4.
Avicii, real name Tim Bergling, said he wrote the song - then called 'Penguin' - last year and sent it to a number of singers to suggest vocal parts for. One was returned called 'Collide', but he overlooked it in favour of another version.
Executives at Syco claim they heard the track and picked it for Leona's comeback. Avicii's manager, however, said they turned Syco down, because the producer wants to release the track as 'Fade Into Darkness' himself.
A spokesperson for Avicii's label, Minstry of Sound, said: "Avicii is an up-and-coming talent; we think he should be given a fair crack at making this record the hit it deserves to be."
There appears to be some confusion, however, as Avicii's manager has previously said he was "under the impression" Syco were going to sample the same track as Avicii - 'Perpetuum Mobile' by Penguin Cafe Orchestra - rather than use his arrangement for Leona's song.
Leona has previously tweeted: "With regards to my song, Avicii was aware and agreeing publishing splits for himself and his manager (sic).
"When Avicii sent his track out to have a song written over it I totally fell in love with this version and I think he's super talented (sic)."