The Black Eyed Peas singer stays on trend in harem pants during a London outing. Plus: Rihanna, Audrina Patridge, Kate Hudson and more

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ALL ABOARD!

Jim Carrey whoops it up Thursday at a launch event for Disney's A Christmas Carol train tour at L.A.'s Union Station. The 40-city rail tour – which will feature props from the film (out in theaters Nov. 6) – is winding its way around the country, ending at New York's Grand Central Terminal on Oct. 30.