That would be Winehouse, in case you wondered which Amy is the subject of director Asif Kapadia's uncreatively titled documentary, which refines an apparent Kapadia specialty: the intense remembrance of stars who died too young. We see the doomed chanteuse in the throes of her destructive relationships — with a responsibility-averse father, with a volatile husband, with chemicals — and hear her music remixed to highlight how it was driven by the raw power of personal-demon-indulgence.