Study: When Paris Hilton, Anna Nicole Smith, Donald Trump Appear In Ads, Consumers Are Less Likely To Buy The Product...

A recent study revealed that Ty Pennington, the megaphone-wielding host of ABC's "Extreme Makeover: Home Edition," isn't the most recognized name in Hollywood, but he carries the most clout on Madison Avenue.

The celeb handyman, who sells his own line of housewares at Sears, is the best at getting consumers to pull out the credit card, a new study says.

Sexpot Anna Nicole Smith, hotel heiress Paris Hilton, Britney Spears, supermodel Kate Moss and real estate mogul Donald Trump were all examples of celebs whose association made it less likely a person would buy a product, the study said.

They're just marketing the wrong products. Here are some suggestions:

Anna Nicole Smith - "a mind is a terrible thing to waste."

Paris Hilton - Sony's "Low Blow", the new low-light video camera.

Donald Trump - Men's Hair Club for Men.

Britney Spears - Pop-Tarts.

Kate Moss - "the only person who's been in Betty Ford more times than Gerald."