SYDNEY (AFP) - US pop icon Britney Spears has broken her silence on the lip-synching "controversy" surrounding her first Australian tour, saying she was only here for her fans.

Spears acknowledged there had been some bad press over her part-mimed 'Circus' show, including reports that disgruntled fans walked out of her Perth concert after just three songs.

"I hear there is a lot of controversy in the media about my show," the star said in a statement late Tuesday.

"Some reporters have said they love it and some don't. I came to Australia for my fans!"

Promoter Paul Dainty earlier said Spears was "extremely upset" by the walk-out claims, which he labelled the "biggest lie I've ever heard".

"It's unfortunate that one journalist in Perth didn't enjoy the show last night. Fortunately the other 18,272 fans in attendance did," one of Spears' staff wrote on social networking sites Facebook and Twitter.

Britney's camp said "thousands of positive messages" had flooded in from fans backing the 'Circus' concerts, her first major tour in five years after a series of personal problems.

Spears, 27, is performing 15 concerts in Australia, in Perth, Melbourne, Sydney and Brisbane as part of the tour which kicked off in New Orleans in March.

The extravaganza hit trouble before it even opened in Australia, with New South Wales state officials suggesting tickets should carry disclaimers because not all the show is performed live.