The 39-year-old fashion designer admits it was an ''incredible honour'' to sing with Geri Halliwell, Emma Bunton, Mel B and Mel C at the London Olympics closing ceremony in 2012, but thinks it was the perfect time for the group - who separated in 2000 and undertook a reunion tour in 2008 - to call it a day for good.
She said: ''I won't ever do it again. Doing the Olympics was an incredible honour. I was so proud to do it; proud to be British...
''That was a perfect time to say, 'That's great. Thank you to everybody, but no more.' Sometimes you've got to know when it's time to leave the party. ''
While Victoria is now a successful fashion designer, she thinks her previous pop career helped her in her current work.
Speaking to Spain and Italy's Vanity Fair magazines, she said: ''The Spice Girls were successful because we celebrated women. That's why I do what I do today.''
The brunette star also revealed she felt ''very emotional'' watching her husband David - with who she has children Brooklyn, 14, Romeo, 12, Cruz, eight, and Harper, two - play his final soccer game before his retirement last May.
She said: ''It was very emotional. We were so proud. He couldn't have given more to the sport than he did...''
However, she also admitted she is happy to have the sportsman spend more time at home with their family now.
She added: ''After so many years, we have shared - and continue to share - him with so many people. So it's nice to have him home.''
'Wilson', starring both Dern and Harrelson, is released in U.S. cinemas on March 24th.
At just 13, Robert Irwin is continuing his father’s legacy and he’s just as enthusiastic about animals as his dad.
Madonna adopted twins Esther and Stella from Malawi earlier this month.