"So I announced it on stage, yes, without everybody else signing off 100%", Mel said.
"I'm always going to say the Spice Girls are going to continue and continue to tour the entire world", she said.
The singer said she has been barracking behind the scenes for Australian shows since January, but the other members "are not on board fully, yet, pencilled in".
The insane fan was quick enough to share series of pictures and videos on Instagram where she can be seen crooning the song "Stop" by the Spice Girls and a picture with a member of the band, Geri Halliwell also known as Ginger.
"Last time I saw the Spice Girls at Wembley was 21 years ago", Adele wrote on Instagram.
The Spice Girls have continued to taunt their Australian fans by saying a down under tour was imminent and then retracting the promise within hours. Victoria Beckham (Posh Spice) did not join them on the tour.
But before you go out and spend your money on platform shoes, a Union Jack dress or Adidas tracksuit bottoms, you might want to hear what Mel B had to say on the topic this morning. I'm sorry I left. "Listen, we just did London, and it actually happened, so I'll make sure Australia happens". I hate to be the bearer of bad news but The Spice Girls have confirmed they're definitely not performing in Oz.
She posted another video thanking her bandmates and everyone who attended the concerts.
At the time, she said she was suffering from exhaustion and needed a break. First, Adele shared a short clip of her singing the band's 1997 hit "Stop" in the backseat of a auto on her way to the show with friends.