1. Sean Combs and Gwen Stefani Backstage at L.A.M.B. fellow celebrity designer Sean Combs congratulated Stefani on her latest collection. Diddy shared the front row with Stefani's son, Kingston, as well as Sophia Bush and rapper Eve, both of whom wore pieces from the L.A.M.B. line. Guests at the show received Stefani's new fragrance, L, as a gift. 2. Gwen Stefani L.A.M.B. creator Gwen Stefani unveiled her Spring collection for a fashion crowd that included everyone from country superstar Carrie Underwood to rap mogul P. Diddy. Even Stefani's cool kid Kingston was on hand, rocking out with dad Gavin Rossdale as the catwalkers strutted in the latest punk flavored L.A.M.B. designs. "I started crying," Stefani later said of her emotional victory lap down the runway with Kingston. 3. Jimmy Iovine and Mary J. Blige Record exec Jimmy Iovine and R&B songstress Mary J. Blige were among the after-show crowd who helped celebrate the release of Gwen Stefani's new L for L.A.M.B. fragrance at a bash hosted by In Style. Shirley Manson, Sophia Bush and Cuba Gooding also circulated at the late-night soiree, held on the rooftop of New York City's chic Gramercy Park hotel. 4. Hilary Swank She wore black, but Hilary Swank looked anything but basic when she attended the 25th anniversary celebration of Calvin Klein Underwear at the company's N.Y.C. headquarters. Swank and Blood Diamond star Djimon Hounsou are the new facesand bodiesof the label's sexy underwear line. 5. Kate Bosworth Guests like Kate Bosworth, Nick Cannon and Amanda Peet were offered Bellinis on arrival at N.Y.C. landmark Cipriani for the Rag & Bone show. Bosworth described her Rag & Bone look as part equestrian and part street chic.