Every decade or so, there’s a sex symbol, and a performance, that become indelibly etched in the history of cinema as one of the most alluring parts put to film. In 1946, Gilda was one of them, with Rita Hayworth in the title role, and a dress, that proved absolutely iconic. If you need to explain it, “Put the Blame on Mame” – though, when Hayworth sang that song on screen, she actually was lip-synching a recorded performance by Anita Ellis.