They’ve successfully parlayed their childhood stardom in to a massive style empire, and Mary-Kate Olsen and Ashley Olsen have some of the best duds on the rack.

However, celebrity stylist Lysa Cooper claims that the “Full House” cuties actually rip off other designers rather than come up with their own concepts.

Cooper slammed celebrity clothing lines, noting, "The only one that's any good, and I hate to say it, are our girls, the twins. The Row.”

“But the reason that works, is because they hired designers. They 'yay' or 'nay' [the concepts]. And they are the best line at ripping off other lines that I've ever seen."

Lysa added, "I mean, they've taken Rick Owens, Ann Demeulemeester. But it's good. You know, they're good at it. I don't buy it, but they're good at it."