Adding one of the most sought after acts in show business to their lineup, Katy Perry will be taking the stage at the 2010 Victoria's Secret Fashion Show. Held in New York City, the "Teenage Dream" singer will be performing a few tunes as girls strut the catwalk during the CBS show airing on November 30th. Previously talking about having to be looking her best on the Victoria's Secret stage, Katy told ET's Kevin Frazier, "I might need to up my game. Maybe a couple of extra workouts so I can fit into some of those outfits." Excited about the night in general - which also will feature a perform...