Zayn Malik reportedly refused to play BBC Radio 1's Big Weekend on the same day as Little Mix.
The 'Pillowtalk' hitmaker was engaged to singer Perrie Edwards before breaking up with her last August just weeks before they were set to move into their dream home.
Zayn - who is now dating supermodel Gigi Hadid - has been in negotiations to play at the radio station music extravaganza in Exeter, South West England, in May but talks hit a stumbling block when he insisted he wouldn't take to the stage the same day as Perrie and her bandmates as he didn't want an awkward backstage encounter - even though the girl group are yet to be added to the line-up of the event.
A source told the Daily Mirror newspaper: "Zayn's team don't want it to become 'a thing' if the two of them are backstage at the same time. It will take the shine off his performance, because many people would then just talk about his past relationship. Zayn and his team really want his solo career to be all about the music. Obviously there are ways to ensure they are kept apart at the site. But once they are both at the same location on the same day, tongues will wag. And if they were to bump into each other, it would make the whole day awkward."
Little Mix are on tour the same weekend of the mini-festival which takes place on May 28 and May 29, so if they cannot commit then Zayn will be free to play any day he chooses.
Coldplay, Ellie Goulding, Bring Me The Horizon and Chase & Status have all been confirmed for BBC Radio 1's Big Weekend so far.
Zayn's debut solo single 'Pillowtalk' has been a hit all over the world since he released it last week and his album 'Mind of Mine' will be released on March 25, exactly one year since he quit One Direction.