Tim McGraw and Willie Nelson are returning in separate TV commercials set to air Feb. 1 during Super Bowl XXXVIII. McGraw will appear with Rick Fox of the Los Angeles Lakers in an Anheuser-Busch ad emphasizing a new alcohol awareness tagline, "Responsibility Matters." Portraying celebrities arriving at an upscale nightclub, McGraw and Fox soon learn that the real VIP treatment is reserved for designated drivers. This is McGraw's second commercial for Anheuser-Busch promoting designated drivers. ... In his latest spot for H&R Block, Nelson hosts a mock infomercial for a look-alike doll dispensing tips on tax preparation. The spot ends with a surprise appearance by another celebrity who receives questionable advice from the doll.