Spotted: Taylor Momsen Rocks Out With David Letterman

Every day a multitude of stars wander through the halls of MTV News to talk about their latest projects and goof around with our intrepid correspondents. But sometimes we catch stars elsewhere, and that’s why we put together Spotted!, a daily compendium of stars in the wild.

Taylor Momsen only just turned 17 years old, but she has already managed to infiltrate two different entertainment universes in pretty impressive ways. Of course, she is best known for her role on “Gossip Girl” (which returns for its fourth season this fall), but her current project has been even more intense (and loud). The Pretty Reckless, the punk-powered band she fronts, is about to unleash its full-length debut Light Me Up (it hits stores this Tuesday, August 31) and just wrapped up a stint on the Vans Warped Tour (where they were extremely well-received). Momsen has blossomed into quite the impressive rock and roll frontwoman, which was in full effect on Wednesday night (August 25) on “The Late Show With David Letterman.” Her band ripped through their single “Make Me Wanna Die,” complete with keyboard fills care of CBS Orchestra band leader Paul Shaffer. The Pretty Reckless’ album could end up being one of the big sleeper hits of the season, and Momsen could be on her way to true rock stardom.

She wasn’t the only star in the public eye, as “Glee” star Dianna Agron hung out with boyfriend Alex Pettyfer and Swizz Beatz and Mary J. Blige partied at Lucky Strike in New York. Click here for these photos as well as the entire “Spotted” archive, which features over 450 candid shots of stars like Britney Spears, Taylor Swift, Eminem, Miley Cyrus, Justin Bieber, Jay-Z, the Jonas Brothers, Katy Perry, Lady Gaga, Mariah Carey, Madonna, Justin Timberlake, Rihanna, Adam Lambert and 50 Cent!