Snooki, Kristin Cavallari, and 18 More Reality TV Stars Who Made It Big (PHOTOS)

To this day, we still can't wrap our heads around a talented singer like Jennifer getting booted off American Idol in seventh place. Eight years later, she's now a Grammy and Oscar winner — and the proud mother of son David with fiance David Otunga. You can catch Jennifer as Sister Rosemary in the recently released Farelly brothers comedy The Three Stooges.