Leona Lewis has thrown her support behind U.S. presidential candidate Barack Obama - insisting his appointment would be a "huge step forward for America."The Bleeding Love hitmaker is keeping a close eye on the run up to Tuesday's election, when Democrat Obama will take on his Republican rival John McCain, and Lewis is convinced that Obama is the perfect choice for American voters.She says, "I think Obama is amazing. He's just so cool and articulate. Nothing fazes him. I think it would be a huge step forward for America and the world."It would mean so much to have a mixed-race president, I just can't explain. The country needs that change. It would mean everything for ethnic minorities in that country and every
country around the world to have a mixed-race leader of America."
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