Britney Spears and Kevin Federline had a massive bust-up at the US premiere of 'Charlie and the Chocolate Factory', it has been claimed. The pregnant singer, who is rumoured to be expecting twins, and Kevin arrived at the Hollywood premiere of the children's film, starring Johnny Depp, smiling and looking happyHowever, Britney - who wore a blue vest with words "I have the golden ticket" accompanied with an arrow pointing to her swollen bump - was later seen blasting Kevin at the premiere party over his excessive drinking and smokingAccording to reports, the 23-year-old was furious with her husband and began lambasting him for smoking around her while she is still pregnantA source said: "Britney told Kevin to avoid the free booze at the party and top lay off the cigarettesShe's sick of all the speculation surrounding his decision to keep smoking while she's pregnant"Kevin had a few glasses of champagne and a smoke and she just hit the roof calling him selfish" Last week, Britney was warned she had to stop inhaling Kevin's second-hand cigarette smoke to ensure she had a healthy pregnancy New York medic Holly Phillips publicly advised the singer to avoid inhaling cigarette smoke, slow down in the bedroom and give up fast food to give herself the best chance of a 'normal' birth

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