In a very satisfying end to a story the Post would definitely have made up if it had not been true, the mysterious "Cat Lady," who has been robbing posh boutiques around the city this summer, has apparently been caught. "It wasn't a purr-fect crime after all," reports the Post, which is really the only publication you should be reading about this story. "The suspect was identified as Shanna Spalding, 28, of Queens, who sings with a death-metal band called Divine Infamy under her stage name, Purgatory."