Since Claire Boucher—known as Grimes—put out her crystalline tour de force, Visions, in January 2012, she’s become an indie cult phenomenon, posed for Vogue and attracted millions of viewers on YouTube. The GarageBand devotee has veered into increasingly stranger yet somehow poppier directions over the years. She’s taking the Fox Theater stage with Brooklyn’s avant-garde songstress Tei Shi and LA singer-songwriter HANA.