For reasons that obviously need no explanation, we support all extracurricular endeavors pursued by the Gossip Girl cast. So if Taylor Momsen wants to dress up like a baby Debbie Harry and explore her seedy indie-rock underbelly, we’re prepared to deal with whatever results the project might yield — even if the whole concept makes us a little nervous (we’re old). But Momsen and her band, Pretty Reckless, made their debut last night and, frankly, we’re impressed with Little J’s burgeoning punk-rock chops! To wit, Spin praises her “raspy roar,” a voice that suggests “angst and bitterness.” Having never been 16-year-old CW stars, we’re not sure where that angst and bitterness is coming from, but give her a few more years on a soundstage, and the girl will have formidable convulse-and-growl routine. Watch and be pleasantly surprised.