The Saints-Colts match-up is not the only draw on Sunday's Super Bowl. Millions also tune in to see the clever ads. But CBS is stirring up controversy by airing the first-ever advocacy ad on one of the most divisive issues. College football star, Heisman winner and hero of Christian conservatives, Tim Tebow will appear in an ad sponsored by Focus on the Family, highlighting his mother's decision to give birth against doctor's advice. The spot has viewers anticipating Sunday's commercials more than ever, says Stuart Elliott, advertising columnist for the New York Times.