"Are you stalking me," asked Isaac Mizrahi last night when I told him how much I loved hearing him speak at the 92nd Street Y a few weeks ago? "Oh my god no," I whimpered as the color drained from my face. "Kidding!! I'm SO glad you enjoyed it, that's so great to hear! It was so fun and I'm so happy you loved it," he squealed in delight. While my heart slowly started beating again we talked cheesecake and tartan and the impossibility of guest cheesecake designers at the launch of his new line for QVC, Isaac Mizrahi Live. The party was held on a soundstage with a cubed centerpiece made from TVs - tiny old portable TVs, giant flat screens, a rainbow of TV variety - playing Isaac's colorful show. I've never watched QVC (alas, no TV), but by the end I found myself determined to own a tartan Isaac blanket. I was not, however, determined to tell Ashley Olsen (who huddled in a corner with her sister and publicist) that I loved hearing her speak at the Y, too. One stalking insinuation's enough for a night (a lifetime really).