Graced with an operatic range and a cabaret siren’s ability to infuse intimacy into each note, Rufus Wainwright makes every song a signature number. This is as true of his rhapsodic takes on Judy Garland medleys and Shakespearean sonnets as it is of his swooning early heartbreak ballads (“Imaginary Love”; “Danny Boy”) and later tunes both raucous (“Between My Legs”) and reflective (“Montauk”).