U.S. media have their eyes glued on Jordyn Wieber, the reigning world all-around champion from Michigan. But before Wieber landed on top in 2011, Aliya Mustafina, now 17, was gymnastics’ diva and the 2010 world champion. A torn ACL sidelined her last season, but she has shown flashes of her former greatness — albeit inconsistently — since returning to competition last December. If she can regain top form in time for the Olympics, she may challenge the American for gold.