Some celebrities request ice buckets stacked with vintage champagne. There’s one A-lister who insists everything – from the walls of her dressing room to every item of food provided – is white. But not Britney Spears.

The celebrity rider for one of the world’s most photographed women is relatively modest and includes French vanilla coffee, one vegetable platter, a bag of Doritos and two boxes of Pop-Tarts.

It’s a fair bet those last two items have come in handy over the past few days, with Britney’s two young sons Sean Preston, 4, and Jayden James, 3, having flown in to Australia to cheer up their mother in the wake of the lip-synching backlash.

But according to a new book, the fact nobody is actually hearing Britney sing live should come as no surprise. Steve Dennis, a former tour insider and the author of Britney: Inside The Dream, exclusively tells Woman’s Day that “she’s been doing it [lip-synching] for years”.

“Britney never has had the best voice in the world, and yet she’s always been an incredible burlesque-style performer – a true entertainer who creates a spectacle. It’s in that context that her fans appreciate her. It’s in that respect that she does exactly what it says on the tin,” Steve explains.