Like a screaming harpy accompanied by a harpist, British singer Florence Welch flew into NYC on Monday for the first of two shows here. I was eager to see this woman, whose brilliant opus of a record, Lungs, is one of the best, and hardest to classify debut albums ever. In it I hear, and call me crazy, Concrete Blonde, Kate Bush, Siouxsie Sioux, Cocteau Twins, and Sinead O’Connor. She yelps. And screams. And sings her heart out.