3. Brittany Spears: A product of the Disney Studios, Spears shed her squeaky clean image and skyrocketed to superstardom. Along the way, Spears made her share of questionable decisions, all broadcast by the paparazzi. After marriage to Kevin Federline, one of her backup dancers, Spears had two children, went out in public sans panties, shaved her head and lost custody of her young children and control of her fortune. Following several hospital stays, Spears was diagnosed with bipolar disorder. Guest stints on “X Factor” and renewed stability have helped her rebuild her reputation.