Whether attracting or repelling her audiences, the superb international chanteuse Ute Lemper is never less than magnetic. Her style is perversely polymorphic: One moment she tears into a song with predatory hunger, then she might purr out a dreamy croon or toss back her head for a brassy squeal of jazz. At 54 below, she applies her subversive irony and aquiline glamour to a polyglot selection of songs from around the world.