Britney SpearsBritney Spears is currently touring AustraliaBritney Spears has landed herself in another media storm.

But this time it's not about her personal life.

Instead it's to do with her singing - or rather, the lack of it.

Hundreds of Australian fans are reportedly storming out of her "live" shows on her Circus Down Under tour.

Britney kicked off her tour in Perth this weekend amid widespread criticism that she would be miming, not singing.

But Britney's got one fan covering her back - fellow singer John Mayer.

He Tweeted: "If you're shocked that Britney was lip-syncing at her concert and want your money back, life may continue to be hard for you."

Concert promoter Paul Dainty also hit back at reports.

He said: "Britney is aware of all this and she's extremely upset by it.

"She's a human being. I'm embarrassed, with such a big international entourage here with Britney, to be part of the Australian media when I see that kind of totally inaccurate reporting. It's the biggest lie I've ever heard. I'm so angry.

"We can take heat if there's something wrong and people can review shows badly – that's something you have to live with – but to say people stormed out of the show was an absolute fabrication."

Britey's manager Adam Leber agreed, Tweeting: "It's unfortunate that one journalist in Perth didn't enjoy the show last night. Fortunately the other 18,272 fans in attendance did."

It's never quiet in Britney's world - take a look at her LIFE OVER TIME.