Tulisa Contostavlos has apologised via Twitter for cancelling her scheduled appearance at GuilFest.

The singer was due to perform at the Surrey festival on Saturday (July 14) but the Daily Mail reports that Tulisa cancelled the show 30 minutes before her stage time.

The X Factor judge had been in Ibiza prior to the gig, with some tabloids suggesting that she pulled the show after partying too hard.

However, she took to Twitter to tell her fans that she was "really unwell" and couldn't perform. She said:

"So sorry I had to cancel at Guilfest guys. I was really unwell. Hate letting down my fans but I genuinely couldn't perform. Im on the mend X."