Britney Spears surprised onlookers with her preparation for an appearance on the X Factor at the weekend, it has been revealed.While relaxing at her suite in the sumptuous Dorchester Hotel on Londons Park Lane, the singer and her entourage chose not to sample the Michelin-starred concoctions being created in Alain Ducasses restaurant kitchen downstairs.Instead, onlookers were stunned when her driver arrived back at the hotel after a 30 minute absence with 11 pizzas and lashings of ice cream, reports the Sunday Mirror.An anonymous source at the scene told the paper There was high drama when Britney arrived with all the photographers taking pictures. She looked absolutely gorgeous.However, there were some raised eyebrows downstairs when they took pizzas up to her room, just because you wouldnt expect someone with her figure to eat that.For those who would rather create their own fresh homecooked meal than dine on takeaway pizza, a beautifully-appointed kitchen with a modern and practical stainless steel sink is just the ticket.