And the singer's fans had nothing but praise for her on social media, as they admitted they had been "surprised" by Mel's "honest" and "down to earth" chat.
Fans, many dressed in the girls' signature outfits, swarmed around Croke Park, Ireland's largest stadium.
On Friday night, Britain's most famous (but not necessarily favourite) girl band played the first date of their Spice World comeback tour in Dublin - "where it all began", as Emma Bunton noted, more than 20 years ago.
Although they have since made up, Geri was believed to be upset over the claim, with sources saying Mel B had "done damage" to their friendship.
Organisers declined to commet, but on Saturday morning, Melanie Brown shared a video message with fans on her Instagram story and addressed the issue, "We will see you in Cardiff". "Thank you Dublin! #welove #weserve #wecelebrate #SpiceWorld", she captioned the snaps.
Fans apparently left the venue because of the low sound quality and another user wrote it was the "worst sound I've ever heard at a concert". "And hopefully the vocals and the sound will be much, much better, pfft", she said.
I love you all so much, more than ever!
She added: "We will see you in Cardiff". Like a king or a queen, we celebrate you.
The band announced their 13-date United Kingdom stadium tour in November, their first reunion since they joined forces to close out the Olympic Games in London in 2012.
If you want to spice up your life, then E! has the photos for you.
"The sound at the Spice Girls at Croke Park is terrible", another said while one wrote: "@spicegirls at the show in Croke Park and can't hear a word from your mics, turn it up".