Plot: From her childhood, watching The Sonny and Cher Show, Robyn Fisher blossomed into a superfan, with a sprawling collection of memorabilia that covers the diva’s entire career. Joining Robyn is her daughter Marina, who’s grown up alongside the collection, and show-business appraiser Marcia Tysseling, who once handled consignment items for Cher herself (and in fact sold Robyn many items in her collection)