1.   But not every celebrity wants to wear Hilfiger clothes, which are often walking billboards for the designer.

2.   Major-league baseball wants us to pay even more money for the honor of turning our kids into walking billboards for the Dodgers, Yankees and the rest of them.

3.   Not only does that yield more loyal fans, but it also turns them into walking NFL billboards.

4.   Luke McCabe and Chris Barrett are offering to be walking billboards for companies that will sponsor them and contribute toward their tuition, room and board.