So what if the Belieber Nation is taking over town? Everybody knows there's nothing like a guitar-playing cat, a skateboarding cat and a cat acrobat to showcase true talent. Samantha Martin's talented feline troupe is, amazingly, just your run-of-the-mill tabbies and such. Still, they've wowed the world via YouTube and are playing to sellout crowds in Old City. Note: Yesterday's planned visit to Philly was cancelled because of tour bus troubles. They should never have let the Siamese drive.