Britney Spears reportedly shocked fellow diners when she changed her baby's dirty nappy - on a restaurant table.Customers were horrified as they watched the pop babe clean up five-month-old Sean Preston as they enjoyed a meal at a lavish Los Angeles eatery.One said: "It was disgusting. Someone else has got to eat at that table. Yuck." The restaurant manager is quoted in Britain's News of the World newspaper as saying: "It's Britney Spears. What can we do?"Meanwhile, Britney and husband Kevin Federline are reportedly expecting their second baby together.The star, who has allegedly told aides to cancel all her upcoming appointments, has already conceived but is delaying announcing the happy news until she reveals it on her personal website.A source said: "Britney is being really secretive, but she's excited that Sean will have a little playmate soon."Britney sparked fresh pregnancy rumours after being photographed with an apparent baby bump earlier this monthThe 24-year-old was spotted with a rounded stomach during a holiday in Hawaii.

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