What is the one thing that Broadway is missing right now? John Stamos Girl Power! According to Crain's, Judy Craymer, the producer of the international hit Mamma Mia!, has just signed an agreement with music manager Simon Fuller, Universal Music and the Spice Girls themselves to create a new musical based around their music. But wait, didn't that already happen with Spice World? The musical, tentatively titled Viva Forever, is expected to premier in London in two years before coming to Broadway. Whether this heralds another trend of platform shoes and Union Jacks remains to be seen.