In a world where anyone halfway famous has his own beauty product and/or fashion line -- Avril Lavigne, Heidi Montag, Pete Wentz; we could go on, but it's too painful -- it might seem that slapping your name on a perfume and a few miniskirts is a license to mint money. Apparently not. After reporting earlier this month that L.A.'s see-and-be-seen boutique Kitson had dropped both Lauren Conrad's fashion line and Victoria Beckham's dVb menswear, we realized that celebrity fashion lines are hard work, people. So we asked Kitson owner Fraser Ross for his do's and don'ts. Take heed, C-listers.