Emma said: "There's no plans for Glastonbury but we should though".
Mel B said Posh would be joining the girls for their Wembley date, to which the girls laughed.
"I won't be joining my girls on stage again, but being in the Spice Girls was a hugely important part of my life and I wish my girls so much love and fun as they go back on tour", she wrote on Instagram. "And I was like, 'I LOVE YOU TOO'".
Mel C was quick to point out that she was "fibbing".
Emma agreed, saying: "We are celebrating for the women who were there when we came out - they're going to have a great time!"
Tickets for this new tour will go on sale this Saturday (Nov. 10) online.