Mel B, real name Melanie Brown, labelled Geri "bats*** crazy" and Victoria Beckham a "b****" in a chat with Piers Morgan for his ITV Life Stories show. "But I love harmonising with the other girls, it's a handsome thing".
In March, Mel B claimed in a TV interview that she had bedded bandmate Geri Horner, known as Ginger Spice, at the height of their fame. The singer was rushed to the hospital with a chauffeur driven vehicle accompanied by an assistant who held her hand in support.
Mel underwent "very swift and very good" care but will still require medication and further intensive treatment, likely to include more trips to hospital.
"I'm a bit exhausted, I'm not going to lie, because it's long, long hours".
She described the fashion mogul as "a bit of a b****", before adding: "But I love her". It needs to happen at this moment in time. A spokeswoman for the Spice Girls said: "The Situation with Mel is under control".
Prime Minister Theresa May is said to be "considering" an invitation to celebrate Girl Power at a Spice Girls concert.
'Hopefully when Geri gets asked that, which hopefully she will after this, she won't deny it, because it was just a thing, a fun thing, ' she stated.
She then rejoined her bandmates.
'Since marrying Christian, Geri has worked hard to shake off her old playgirl image and sort of reinvent herself as this flawless Stepford Wife.
Horner - mother to 13-year-old daughter Bluebell and two-year-old son Monty - admitted rehearsing for a tour in their 40s was not the same for the Wannabe singers as it had been 20 years ago.
The tour is due to kick off on May 24 at Dublin's Croke Park, followed by gigs in Cardiff, Manchester, Coventry, Sunderland, Edinburgh and Bristol, with a three-date finale in mid-June at London's Wembley Stadium.