Before Greta Gerwig’s “Barbie,” there was “Superstar: The Karen Carpenter Story.” “Mattel did pay a visit to our office,” said acclaimed producer Christine Vachon at Karlovy Vary Film Festival. Back in 1987, she was helping out on the Todd Haynes and Cynthia Schneider-produced movie. The now-banned film, dedicated to Carpenter’s tragic life and her untimely […]