Rita Ora has apologised to fans for cancelling her latest gig.

The 'How We Do' hitmaker has pulled out of performing to over 8,000 horse racing fans at the Haydock Park racecourse, Merseyside, tonight (08.09.13) after she was struck down with a throat infection.

Apologising on Twitter, she wrote: ''I would never do this unless I physically had too and in this situation I unfortunately do. I am so so sorry for cancelling my shows.

''This weekend I've never and will never not perform unless I physically can't put on a good show for you I have a bad infection in the throat

''And chest. I am so sorry and as soon as I get better I will make it up to you. I promise. I love you. Rita. (sic).''

The news came as a shock to fans as just days before, the pop starlet appeared to be fighting fit, even posting snaps on Instagram of her training with boxing ace David Haye.

The 'R.I.P' singer - currently dating Scottish DJ Calvin Harris - is also due to play a gig in Zofingen, Switzerland, this Sunday (11.08.13), which at present is still scheduled to go ahead.

Rita is hoping to be in tip top condition again in time for her performance at V Festival in the UK next week.