NEW YORK, 1 March 2012 - Sotheby’s specialist Kate Bryan puts the finishing touches to the  Contemporary Art exhibition ahead of the sale  on 9 March in New York.  The exhibition, which opens this Saturday 3 March, features Cindy Sherman’s iconic ‘Untitled Film Still #21’ from 1978.  The work, estimated $150/200,000, appears at auction just as a major retrospective of the artist’s work opens at The Museum of Modern Art in New York.