400374 01: (UNDATED FILE PHOTO) Singer Britney Spears takes part in a new Pepsi commercial in this photo. Pepsi's Super Bowl commercial will feature Britney Spears in a ninety second spot and a thirty second spot. The ninety second commercial is set to run in the first quarter and will take Spears back through time. The thirty second commercial will run in the second quarter, and it's set to be a bit racier. (Photo courtesy Pepsi/Getty Images)(00)