Everyone's been a bit worried about Target losing Isaac Mizrahi to Liz Claiborne. The designer's been widely credited with building Target's fashion cred, but we've always thought their success stemmed more from their GO International collections. Apparently so do they - the company announced this morning that they won't attempt to form another long term designer partnership and will instead focus on one-off collections. Long term collaborations don't have the best track record. No one ran to Kohl's for Simply Vera, Kate Moss for Topshop always ends up on the clearance rack, and even my mom declared Isaac's Target clothes "frumpy". The only reason I woke up at the crack of dawn for Luella and Proenza was because I knew I'd never have another chance. Had the clothes been on the racks for over a year, I definitely would have slept in those mornings and I probably would have lost interest. Is it the novelty of one-off collections that makes them more successful? Or is it that the cooler designers aren't willing to commit to years of mass market work?