Lauren Conrad may be expanding her eponymous design line — recently previewing Holiday, Fall/Winter and Resort collections as well as discussing a possible shoe line — but not everyone is buying it. Kitson owner Fraser Ross has dropped Conrad’s line from his well-known Robertston Boulevard boutique, citing flagging sales coupled with a lack of support on Conrad’s side. Ross tells PEOPLE, “Celebrity clothing lines are a tough sell as it is, and you have to promote your line just as you would an album or a TV show.” And as Ross points out, it’s not that Kitson is inaccesible for Conrad. “Lauren has been on Robertson three times since her clothing line launched but she couldn’t pop by to say hello to the sales staff that sell her line to her fans.” Ross’s advice to Conrad on how to succeed in fashion reasonates to all of her fellow celeb designers. He explains, “You have got to make your clients and customers happy because you are competing against a lot of talented designers in the industry.” Tell us: Have you bought L.C.’s clothing line?