Scary Spice herself was on hand to introduce a special Rooftop Cinema Club screening of Spice World in Los Angeles on Wednesday and gushed about how the four other members of the girl group are still her "best friends" -- but she wasn't letting Posh get away with saying her mic was cut so the other girls could sing.
"She wishes it was turned off!" Mel B told ET's Lauren Zima. "We sung live, and we wrote and recorded all our music together live and we performed it live. It wasn't turned down. Not that I know of. Maybe she secretly asked for that -- I don't know about that."
The 41-year-old singer revealed it had been years since she'd watched the 1997 cult classic, but said she only has fond memories of shooting the film with Beckham, Emma Bunton, Mel C and Geri Halliwell.
"I think just doing 12-hour days and going delirious with each other!" she recalled to ET her favorite memory from shooting the film. "We just had a lot of fun! You know, you've got five young girls that are together and just living their dream and doing whatever we want to do, saying what we want to say, wearing what we want to wear!"
As for that last bit, Mel says she still owns all of her iconic Spice Girls costumes.
"I have everything! Because we kind of made up our own costumes as we went along," she explained. "The more money we got, the more tailor-made our clothes got, but we actually were bargain hunters and I still am to this day.
EXCLUSIVE: Mel B responds to Victoria Beckham's Spice Girls microphone drama: 'She wishes it was turned Off'
From left, Mel B, Geri Halliwell, Emma Bunton and Mel C arrive for Viva Forever! Press Night, a musical based on the songs of the Spice Girls, at the Piccadilly Theatre in central London, Tuesday, Dec. 11, 2012. (Photo by Joel Ryan/Invision/AP)
Britain's Prince of Wales with the pop group Spice Girls at the Royal Gala celebrating the Princes Trust 21st Anniversary in Manchester Friday, May 9, 1997. (AP Photo/John Giles, pool)
British group the Spice Girls wave to the crowd from the terrace of the Martinez hotel in the Cannes bay Sunday May 11, 1997, during the International Cannes Film Festival. (AP PHOTO/Remy de la Mauviniere)
Kathie Lee Gifford, right, smiles as "Ginger Spice" Geri, far left, points to the kiss she planted on Regis Philbin, second from right, during the "Spice Girls" appearance on the television show "Live with Regis and Kathie Lee," Friday, May 16, 1997, in New York. The other members of the group, from left, are: "Sporty Spice" Melanie C., "Posh Spice" Victoria, "Baby Spice" Emma and "Scary Spice" Melanie B." (AP Photo/Steve Friedman,Buena Vista Television)
World famous pop group Spice Girls first row from left to right; Victoria, Emma, Geri, 2nd row left to right; Mel B and Mel C gesture during a press conference in Istanbul on Saturday May 31, 1997. The Spice Girls will perform in concert in Istanbul's Inonu Stadium on October 12th. (AP Photo/Murad Sezer)
The British band Spice Girls arrive at the MTV Music Awards in Rotterdam Thursday, Nov. 6, 1997. (AP Photo/Serge Ligtenberg)
The Spice Girls arrive for the MTV Video Music Awards at New York's Radio City Music Hall Thursday, Sept. 4, 1997. The group won in the Best Dance Video category for their video "Wannabe." (AP Photo/Doug Kanter)
The Spice Girls pose for photographers after the MTV Video Music Awards at New York's Radio City Music Hall Thursday, Sept. 4, 1997. The group won in the Best Dance Video category for their video "Wannabe." (AP Photo/Emile Wamsteker)
British band Spice Girls pose at the presentation of the MTV Music Awards in Rotterdam Thursday November 6 1997. The Spice Girls won the Best Group category. (AP Photo/Dusan Vranic)
The Spice Girls, form left Emma, Victoria, Mel C, Geri and Mel B., wait to meet Britain's Queen Elizabeth II, after the Royal Variety performance in the Victoria Palace Theatre Monday evening, Dec. 1, 1997. The girls performed extra numbers after international star, Shirley Bassey pulled out of the show at the last minute. (AP Photo/PA-WPA ROTA, Pool)
Pop artists Spice Girls perform during the Billboard Music Awards, Monday night, Dec. 8, 1997, in Las Vegas. The Spice Girls were honored during the awards show with New Artist of the Year and Album of the Year. (AP Photo/Lennox McLendon)
Geri Halliwell and Victoria Beckham pose for a photo shoot at the Four Seasons Hotel on April 29, 1997 in Kuta, Bali, Indonesia. (Photo by John Stanton/WireImage)
Victoria Beckham, Mel C, Emma Bunton, Geri Halliwell and Mel B from The Spice Girls (Photo by Jeff Kravitz/FilmMagic)
UNITED STATES - SEPTEMBER 04: The Spice Girls attending the 1997 MTV Video Music Awards, NYC. 09/04/1997 (Photo by Vinnie Zuffante/Getty Images)
LONDON, UNITED KINGDOM - OCTOBER 16: A young girl holds the Spice Girls dolls which were unveiled at the Toy Retailers Fair in London by the Character Group which has exclusive rights to distribute the dolls in the UK 16 October. (Photo credit should read JOHNNY EGGITT/AFP/Getty Images)
Paris, FRANCE: (FILES) File photo dated 16 December 1997 shows the Spice Girls posing at a hotel in Paris. Pop group the Spice Girls announced 28 June 2007 they are to reform for a world tour, saying 'girl power is back and stronger than ever,' in a statement posted on their website. AFP PHOTO THOMAS COEX (Photo credit should read THOMAS COEX/AFP/Getty Images)
INDIANAPOLIS, UNITED STATES - 1998: L to R Melanie Brown, Melanie Chisholm, Emma Bunton and Victoria Adams from the Spice Girls in Indianapolis celebrating their hit 'Viva Forever' reaching number 1. (Photo by Dave Hogan/Getty Images)
L-R Mel C (Melanie Chisolm), Geri Halliwell, Emma Bunton, Mel B (Melanie Brown), Victoria Adams of the Spice Girls pose for a studio group portrait in 1998 in Birmingham, United Kingdom. (Photo by Mike Prior/Redferns)
Portrait of UK pop group The Spice Girls (Victoria Beckham, Melanie Brown, Emma Bunton, Melanie Chisholm and Geri Halliwell) photographed in London in 1998. Job: 34206 Ref: SDD - Non-Exclusive - World Rights Only (Photo by Steve Brown/Photoshot/Getty Images)
Melanie Chisholm, Geri Halliwell, Victoria Beckham, Emma Bunton, and Melanie Brown of the Spice Girls (Photo by Jim Smeal/WireImage)
NEW YORK CITY - JANUARY 14: Pop group Spice Girls: 'Posh Spice' Victoria Adams, 'Scary Spice' Melanie Brown, 'Baby Spice' Emma Bunton, 'Ginger Spice' Geri Hallliwell and 'Sporty Spice' Melanie Chisholm promote their new movie 'Spice World' on January 14, 1998 at Planet Hollywood in New York City. (Photo by Ron Galella, Ltd./WireImage)
UNITED KINGDOM - FEBRUARY 10: BRIT AWARDS, LONDON ARENA Photo of SPICE GIRLS, Group portrait L-R Melanie Brown (Mel B), Victoria Adams (Beckham), Geri Halliwell, Emma Bunton and Melanie Chisholm (Mel C) (Photo by JMEnternational/Redferns)
UNITED KINGDOM - FEBRUARY 10: BRIT AWARDS, EARLS COURT Photo of SPICE GIRLS, Group performing live on stage L-R Melanie Chisholm (Mel C), Geri Halliwell, Victoria Adams (Beckham), Emma Bunton and Melanie Brown (Mel B) (Photo by Mick Hutson/Redferns)
UNITED KINGDOM - APRIL 01: WEMBLEY ARENA Photo of SPICE GIRLS, Group performing live on stage Spiceworld tour L-R Melanie Chisholm (Mel C), Geri Halliwell, Victoria Adams (Beckham), Emma Bunton and Melanie Brown (Mel B) (Photo by Mick Hutson/Redferns)
LONDON, UNITED KINGDOM: The Spice Girls pop group pose for photographs next to their life-size wax models at Madame Tussaud's Rock Circus in Piccadilly 17 December 1999 in London. (From L) Scary, Posh, Sporty and Baby are the first pop band combo to be modelled since the Beatles in 1964. (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
LONDON - DECEMBER 15: Sarah Ferguson with daughters Eugene and Beatrice pose with The Spice Girls on December 15, 1999 at Earls Court, London. (Photo by Dave Hogan/Getty Images)
Spice Girls in New York City, New York (Photo by RJ Capak/WireImage)
UNITED KINGDOM - DECEMBER 13: HEATHROW AIRPORT Photo of SPICE GIRLS and Victoria BECKHAM and Geri HALLIWELL and Mel B and Melanie BROWN and Emma BUNTON and Mel C and Melanie CHISOLM, L-R: Victoria Beckham, Geri Halliwell, Mel B (Melanie Brown), Emma Bunton, Mel C (Melanie Chisolm) posed, group shot, at opening of Virgin Terminal 5 (Photo by Stuart Mostyn/Redferns)
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"I think I have probably 80 percent of all my outfits," she went on. "Because when we used to get our outfits made, I used to get like two or three different copies and colors because I was obsessed with my style back then!"
While Mel -- who previously said it "would be rude" not to celebrate the Spice Girls' 20th anniversary this year -- played coy on the possibility of new music, she did confirm there are "ongoing" talks about a reunion tour though.
"It's an ongoing thing we keep talking about, and it is our 20th anniversary, so we're going to do something," she confirmed. "We're just trying to figure that out right now. There will be something happening."
Just don't expect it to be a joint tour with the Backstreet Boys, as has been rumored.
"We want the stage to ourselves if we're going to do it!" Mel exclaimed. "But, I love the Backstreet Boys. They're great."
While Beckham was hitting the red carpets at Cannes, the "Wannabe" band recently had a mini reunion in London. Check out all the photos of the Spice Girls reunited in the video below!