Documentaries about Demi Lovato, Tom Petty, Selma Blair and Charli XCX are among the films set to premiere at next month’s South by Southwest Film Festival. The festival will kick off on March 16 with “Demi Lovato: Dancing with the Devil,” which will explore Lovato’s 2018 near fatal overdose and the aftermath. The Tom Petty documentary, “Somewhere You Feel Free” …
