THEN: Beyoncé (left, in 2004), whose hit "Bootylicious" gave women everywhere a reason to flaunt their curves, has said, "I'm very conscious of being a curvy woman and I'm very happy that I am a curvy woman."

NOW: The singer-actress confessed she went on a liquid diet to lose 20 lbs. for her role in the upcoming movie Dreamgirls, but claims she's put the weight back on: "I am no smaller or bigger than I've always been. It was strictly for the movie."