“Is she really coming?” was the question on everyone’s lips Saturday night at the Guggenheim’s Maurizio Cattelan: All closing ceremony. The “she” in question, Ms. Courtney Love, was to be the grand finale in “The Last Word,” an evening of performances by 30-something artists, entertainers, and scholars in celebration (and in mourning) of Mr. Cattelan’s retirement from the art world. MORE>>