By the time she was in junior high school, “American Idol” champ Jordin Sparks was 5’10” tall and a size 12. That may not come as a surprise, considering the 17-year-old’s genes �" dad Phillippi Sparks was a star cornerback with the New York Giants football team. And while Jordin has said that she’s perfectly happy with her full figure, Star has learned that after she aced her Idol addition in Seattle last September, she did take steps ...