Shanghai (AFP) - Russian teenager Elizaveta Tuktamysheva took gold at the World Figure Skating Championships in Shanghai Saturday, convincingly beating her rivals in a remarkable comeback season.The 18-year-old European Champion scored 132.74 in the final segment to finish with 210.36 overall, some distance in front of second placed Satoko Miyahara (193.60) of Japan and Russia's Elena Radionova (191.47) in third.The victory marks an incredible turnaround for the teen star, who failed to make the Russian team for last year's Sochi Olympics."I am full of emotion right now.