Singer Rita Ora has cancelled an appearance at an Australian music festival after falling sick with a throat infection.

The R.I.P. hitmaker sang at the Brisbane leg of the event on Saturday (02Mar13), but axed her slot at the Sunday (03Mar13) show in Perth after waking up with "no voice".

Doctors have ordered Ora to rest and she hopes to recover in time to perform at next weekend's (09-10Mar13) shows in Sydney and Melbourne.

A statement from festival organisers reads, "It is with great regret that Future Entertainment and Mellen Events announce Rita Ora will be unable to perform at Future Music Festival in Perth today due to a throat infection. She has been ordered to bed rest for the next 24 - 48 hours and is expected to continue all up coming (sic) shows as scheduled."

Ora told fans the bad news in a series of posts on her page and promised to schedule another show in Perth in the future, writing, "I woke up this morning with no voice. I hate this... (I am) carrying on the tour hoping my voice comes back. I promise to put on a private show for you Perth I'm sorry. I hope you forgive me... I love you and I'm sorry... Scariest thing for any artist. When there (their) instrument doesn't work you can't help but worry."

Ora's cancellation was a further blow to organisers of the Future festival after headline act Avicii axed his appearances after being hospitalised with stomach problems.