Victoria Beckham is finally rejoining the world famous group Spice Girls just in time for a very special celebration. The fashion designer and businesswoman, who was recently spotted at Jacquemus fashion show, has been in talks to perform at Geri Horner’s 50th birthday, with the rest of the original band members. The birthday celebration is set to take place in September, just a few weeks after her birthday in August, with Posh Spice making a one time performance with the group in honor of the birthday girl. “It’s going to be an amazing night,” a close source to the group revealed . . .