The re-united Spice Girls, Victoria Beckham, Melanie Chisholm, Geri Halliwell, Emma Bunton and Melanie Brown, were on hand for a photocall at the Royal Observatory, Greenwich, and later for a news conference at the O2 Arena to announce that they will be reuniting for an upcoming tour on Thursday (June 28) in London, England. Watch raw video and reports from CNN, TheShowBuzz and CBS News below. Check out pictures from BigPictures, ExpoSay (photocall 1 / photocall 2 / press conference 1 / press conference 2), FilmMagic (photocall / photocall arrivals & departures / press conference), RexFeatures, GettyImages (photocall / press conference), and WireImage (press conference / photocall arrival / photocall).