Khloe, Kourtney and Kim Kardashian Shill for Skin Care System

Is there anything the Kardashian sisters won't shill for?

Most notorious for backing a dangerous weight loss system that is not approved by the FDA, the siblings have now signed on to represent PerfectSkin, a new beauty product.

While the skin care line hasn't launched yet, Dr. Ron DiSalvo says Khloe, Kourtney and Kim Kardashian are the ideal spokeswomen for it because their lack of talent leaves them open to any sales pitch:

"As women who are constantly in the spotlight and juggling hectic schedules, the Kardashian sisters need a skin care system that's as simple as it is effective."

Kim, of course, is already extolling the virtues of a system that isn't even on the market yet.

"I have literally tried everything out there and nothing even comes close to PerfectSkin, " she said. "It's easier and more effective than anything else I've tried, and they are the only skin care products I use."

PerfectSkin will launch this spring and, truth be told, it's not really that poor of a choice for the sisters. But our original question still remains: Do you think there's any product they would not shill for?