Britney Spears is 'extremely upset' at the Australian uproar over her Circus tour concerts, which feature lip-syncing that has never been a secret, organizers said. (Bryan Bedder/Getty Images) Pop singer Britney Spears's publicity team has blasted Australian media for reports that fans stormed out of a weekend concert because the U.S. performer was lip-synching.

Reports that fans fled Friday's Perth show after a few songs were "the biggest lie I've ever heard," promoter Paul Dainty told the daily newspaper the Australian on Monday.

"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," Dainty said.

On the weekend, a variety of Australian media carried quotes from fans who reportedly left the Perth concert early, decrying it as lacklustre, mimed and criticizing the singer for little interaction with the audience.

Other fans quoted were satisfied with the concert, with a host of congratulatory messages posted after the show on Spears's personal website and on micro-blogging site Twitter.

A spokesman for Perth's Burswood Dome, where the concert was held, said venue officials had received no complaints about the event, the first of 15 Australian dates on Spears's Circus tour.

The lip-synching debate heated up even before Spears arrived in Australia, when Virginia Judge — fair trade minister for the state of New South Wales — suggested that performers who mime or pre-record segments of their concerts should include disclaimers on their tickets.

Spears — on her first tour in five years after suffering a host of personal problems that made international headlines — "is aware of all this [situation], and she's extremely upset by it," Dainty said.

"She's a human being," he said, adding that organizers have never hidden the fact that certain parts of the concert are lip-synched.

"This show is about an incredible spectacle, which it is."