Over the weekend, Victoria Beckham flatly denied that the Spice Girls were headed on tour -- despite rumors.

According to TMZ, the girls ARE going on tour and have already signed contracts to do so.

via TMZ:

Sources connected to the group tell us, Mel B signed on the dotted line last Friday and we're told the other members signed as well.

TMZ broke the story ... the girls have agreed to reunite for a series of concerts in the UK and the U.S. After our story posted, Victoria Beckham told Vogue there would be no reunion tour, but we know Mel B has signed the deal, as have others, and it spells out the specifics, including the number and location of concerts and compensation.

We're told there will be a limited number of concerts in the 2 countries and the group is gearing up to make a ton of cash on merchandise too.

At this point the girls just need to drop the dates and get on with it.