O LOVES LIZ: Isaac Mizrahi’s entire spring collection for Liz Claiborne will make its debut in the March issue of O, The Oprah Magazine after getting a preview in Vogue. A spokeswoman for Liz Claiborne said the brand chose O because it reaches its demographic. In the issue, more than 50 pieces will be modeled by a mix of “real” women, models and celebrities, including Veronica Webb, Becki Newton of “Ugly Betty” and fashion icon Iris Barrel Apfel. The designer has included plus and petite sizes in his collection and has kept it budget conscious. To finish each look, Liz Claiborne is selling coordinated shoes, bags, jewelry and lingerie. “There’s a freedom to what Isaac does,” Webb told O. “He’s not a silhouette dictator — he knows that women have bodies that change.” The magazine hits newsstands on Feb. 17. The O feature will be followed by ones in upcoming months in Harper’s Bazaar, Redbook and Elle, as well as an ad campaign that will kick off in the spring issues of titles including Vogue, Glamour, Lucky, Bazaar and Elle.