PHOTOS: Renée Zellweger's Continuously Changing Looks

(Associated Press)

Attending the premiere of "One True Thing" in New York. (Reuters)

Arriving at the 71st Annual Academy awards in Los Angeles. (Reuters)

Listening during a news conference for the film "Appaloosa" at the 33rd Toronto International Film Festival. (Reuters)

Arriving at the 66th annual Golden Globe awards in Beverly Hills. (Reuters)

Attending "CNN Heroes: An All-Star Tribute" in Los Angeles. (Reuters)

Posing on the red carpet at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of the exhibition "Alexander McQueen: Savage Beauty" in New York. (Reuters)

Arriving at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of the "Schiaparelli and Prada: Impossible Conversations" exhibition in New York. (Reuters)

Attending Giorgio Armani's "One Night Only New York” fashion show. (Associated Press)

At the UCSF Medical Center event in San Francisco. (Associated Press)

At Elle's annual Women in Hollywood Awards. (AP)

Arriving as a guest for the 10th annual Fire & Ice Ball in Beverly Hills. (Reuters)

Arriving for the 73rd annual Academy Awards in Los Angeles. (Reuters)

Arriving at the 74th annual Academy Awards in Hollywood. (Reuters)

Attending the 75th Annual Academy Awards in Hollywood. (Reuters)

Posing with her Golden Globe award in Beverly Hills. (Reuters)

Arriving for the premiere of "Cinderella Man" in Los Angeles. (Reuters)

Arriving at the BAFTA (British Academy of Film and Television Arts) awards in London. (Reuters)

Participating in the TV show "Wetten Dass" with singer Kylie Minogue in Graz. (Reuters)