"I love to support women - Girl Power!," Beckham exclaimed when she accepted her award
She thanked her former manager, her husband and her eldest son, Brooklyn (14), who accompanied the designer and singer to the ceremony - calling him "the most handsome man in the room".
"What an an amazing 10 years. I feel blessed to have had two careers and in ten years I will be nearly fifty," Beckham concluded.
The full list of winners:
Woman of the Decade: Victoria Beckham
Film maker: Rashida Jones
Solo artist: Rita Ora
Sportswoman: Nicola Adams
Theatre actress: Helen McCrory
Band: The Saturdays
Writer: Miranda Hart
Pandora Breakthrough: Samantha Banks
Fashion designer: Clare Waight Keller
Radio personality: Jameela Jamil
TV Personality: Nicole Scherzinger
Presenter: Clare Balding
UK TV Actress: Joanna Froggatt
Entrepreneur: Myleene Klass
International TV actress: Zosia Mamet
Accessories Award: Emma Hill
Editor's Special Award: Jessie J
Man of the year: Daniel Radcliffe
Film actress: Rebel Wilson
Check out our gallery from the red carpet at the ceremony last night