When it comes to making endorsements JON GOSSELIN is a killer.

Far from making big bucks, Gosselin’s endorsement of his clothing killed the Ed Hardy brand.

Who says?

Ed Hardy!

Shortly after splitting from Kate Gosselin, Jon struck up a friendship with Christian Audigier, who licensed Hardy’s art for shirts and a host of other products, RadarOnline noted.

Audigier, who is described as celeb obsessed by Hardy, entertained Jon and his then-girlfriend Hailey Glassman in St. Tropez on his yacht.

Jon was repeatedly photographed wearing Ed Hardy clothing and that association was deadly for the brand, Hardy  told the New York Post.

 “That Jon Gosselin thing was the nail in the coffin,” Hardy said. “That’s what tanked it. Macy’s used to have a huge window display with Ed Hardy, and it filtered down and that’s why Macy’s dropped the brand.” Hardy, 68, puts much of the blame on Audigier, a French businessman.

“Christian worships celebrities so much, he will get next to anyone who is famous for anything. If he could have gotten Charles Manson in a shirt, he would have,” Hardy said.