Many Hollywood celebrities rally behind Obama

Many Hollywood heavyweights who had supported Hillary Clinton are rallying behind Barack Obama, pledging money and star power to his U.S. presidential bid before a big fundraiser next week. Experts say that since Clinton conceded defeat this month after a grueling Democratic nominating contest, celebrities have quickly united behind Obama. The result, they said, could be a campaign cash windfall for the senator from Illinois, but star support doesn't necessarily translate directly to votes.
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