Kelly Clarkson is the first American Idol. Her final song in the first season which is also her first single is the song A Moment Like This. Leona Lewis, on the other hand, is the first female winner of X-Factor, the spin-off to England's brand Idol produced by Simon Cowell. Her final song is also A Moment like This which served as her first single, too. Watch the video and compare which is better among these 2 female champ:

Kelly Clarkson’s A Moment Like This