The Impressionist and Modern art collection of Joanna Carson, the model and third wife of Johnny Carson, is up for auction at Christie's. The items are from the Los Angeles residence where Joanna moved in with The Tonight Show star in the 1970s. The most striking piece is a rare sculpture by Henry Moore, estimated to fetch between $2 million and $4 million. The collection was part of a larger effort by Christie's specialist Jessica Fertig to showcase the rare works. Joanna's nephew, Robert Ulrich, reflects on his memories of her collection, which he believes influenced her taste in art.