We've seen the trashiest ice-cream ads ever made. Here's the poshest. It's a new commercial for Magnum Ice Cream directed by none other than Karl Lagerfeld and starring Rachel Bilson, formerly of The O.C. Oddly enough, it's part of a whole three-part series of short films Lagerfeld has made for Magnum (he must really like the stuff) that premiered Thursday night at the Tribeca Film Festival. This spot shows Lagerfeld model Baptiste Giabiconi directing Bilson (here called "Olivia") at a fashion shoot.