Teenage Dream @ Wetten, dass..? (Germany), 2010/10/02This perfomance took place on the set of the german TV show Wetten, dass..?, hosted by Thomas Gottschalk. Katy Perry was visited it at the occasion of the famous Oktoberfest on 2nd of October 2010. She sang Teenage Dream, her hit single from the album of the same name. She seemed to have fun and the dancers...