The truest test of Simon Cowell's power within the music industry circa 2008 was not whether American Idol could produce a star in its seventh season or if its U.K. cousin, The X Factor, would have another success in its fifth season -- it was whether he could turn Leona Lewis into the international superstar he so clearly believed she is. Lewis was the third winner of The X Factor -- the Cowell-driven replacement to Pop Idol in Britain, a replacement that came to be because he wanted to own a significant piece of the show -- and one of the key differences between Factor and Idol is that the judges can mentor the contestants and therefore have a stake in the outcome of the show, more than they do on Idol, where the judges merely comment. Read More