Turn off your TV set and see the stars as they really are! Bill Cosby - He and his daughter played parts not in a sitcom but in her real-life drug horror story. Oprah Winfrey - No diet could lose the memory of girlhood sexual abuse and the child she lost. Ryan O'Neal - The way he treated his teenaged daughter barred him and Farrah from Tatum's marriage to John McEnroe. Sharon Gless - The star of ''Cagney and Lacey'' was pursued by a woman out to love her to death. Vanna White - Sex and drugs spun her wheel of fortune. White powder and scarlet sin. AIDS and self-destruction. Ruthless ambition and remorseless back stabbing. All in the brand new book that names names, prints exclusive interviews, and offers eye-opening photos of television's biggest stars and their most shocking secrets.