Spice Girls Perform 'Mama' in Previously Unseen Video from Victoria Beckham's 50th Birthday Party

Victoria's son Cruz joined the band on guitar while they sung along to the hit 1996 single

The Spice Girls are back behind the mic!

The band — consisting of Mel B, Melanie C, Emma Bunton, Geri Horner and Victoria Beckham — reunited to celebrate Victoria's 50th birthday last month.

The fashion designer marked the milestone occasion by throwing a star-studded bash in London on Saturday, April 20, and now her son Cruz Beckham is giving fans a glimpse of a special moment from the get-together.

On Wednesday, May 8, Cruz, 19, shared a clip of the Spice Girls singing their 1996 hit "Mama" alongside him playing the acoustic guitar. He simply wrote in the caption, "You’re welcome…"

Related: Victoria Beckham Celebrates Husband David's 49th Birthday: 'Love Us Getting Really Old Together'

"Are we in tune? I'm not sure we are!" Mel B said into the microphone after the performance, while guests cheered.

Later in the night, the five-piece danced along to their 1997 single "Stop," as seen in a clip shot by Victoria's husband David Beckham and shared by her on Instagram.

“Best night ever! Happy Birthday to me! I love you all so much! #SpiceUpYourLife,” Victoria captioned the video.

Related: Victoria Beckham Thanks Husband David for Making Her Feel 'Special' on Her 50th Birthday: 'I Love You So Much'

"I mean come on x @victoriabeckham @melaniecmusic @officialmelb @emmaleebunton @gerihalliwellhorner 💚💛🧡💜💙🩵🩷🤍," David, 49, wrote while posting the same clip.

During an appearance on Wednesday, May 8's episode of Jimmy Kimmel Live!, David spoke about the Spice Girls performing together at Victoria's party. "I didn't expect them to all get up on stage, but I had a whole video planned where me and my kids recreated the 'Mama' video," he recalled, adding that the girls ended up singing the song themselves.

"I'm their biggest fan. I tend to not tell my wife that, I tend to tell her that I fancied her ... but she was a Spice Girl, so, you know? I love that about her," he continued.

After splitting in 2001, the Spice Girls have remained friends and reunited for a reunion tour back in 2019, minus Victoria.

The designer wanted to focus on her family and her business ventures at the time. She told Vogue Germany it took "a lot of courage not to go on tour with the Spice Girls again, but to be the one who says, 'You know, I'm not doing it because things feel different now than they used to.' "

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The last time the entire group performed together was during the closing ceremony of the 2012 Summer Olympics in London.

The Spice Girls weren't the only celebrities to attend VB's big 50th party, with guests including Tom Cruise, Eva Longoria and her husband José "Pepe" Bastón, Gordon Ramsay, Jason Statham and his fiancée Rosie Huntington-Whiteley, as well as Marc Anthony and his wife Nadia Ferreira being among those to make an appearance.

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