Currently in Australia with her Circus tour, Britney Spears has been left "extremely upset" by reports that fans have complained about lip-synching in her shows, and have stormed out of her concerts unsatisfied.
"It's the biggest lie I've ever heard," Britney's promoter says.
"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."
"Britney is aware of all this and she's extremely upset by it - she's a human being," he added.
The singer has however had many messages of support.
Thousands of fans have written on her personal website and congratulated the comeback, describing her recent performance in Perth as "awesome", "brilliant" and "amazing".
Photo: © Getty Images