LIKE BARBRA STREISAND, Cher, and Lady Gaga before her, Charli XCX is an obvious multi-hyphenate. Few who have seen her in concert, cavorting wildly, commanding a massive audience while all alone onstage, would doubt she’d make a good actress. Now she’s starring in no fewer than seven films, including the historical fantasy 100 Nights of Hero (12/5), alongside Emma Corrin, and two at TIFF this month: Erupcja, a knotty romance set in Poland, and Romain Gavras’s Sacrifice, co-starring John Malkovich. She’s not the only musician onscreen this fall, as another powerhouse, Teyana Taylor, stars along with Leonardo DiCaprio in Paul Thomas Anderson’s One Battle After Another. That film, like Anderson’s Licorice Pizza, features Haim sister Alana as well as Justin Bieber whisperer Dijon. Elsewhere, A$AP Rocky puts his megawatt smile…