GLEEFUL INSPIRATION The pop star got the Glee treatment in the second episode of the show's sophomore season, with the cast recreating some of her most iconic videos and looks. They also put their own Glee spin on songs like ''Toxic'' and ''Stronger.'' Spears herself made a few fleeting appearances, such as her ending a song with the show's Brittany S. Pears (Heather Morris, left). But her most amusing line was when she tried to sell the kids on the idea of ranch dressing on pizza.