Spotted: Katy Perry Has A Jolly Holiday At The Jingle Ball In Los Angeles

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.

One of the big highlights of the holiday season is the huge list of radio festivals that will be going down over the next few weeks. These shows bring together some of the biggest stars in music for some yuletide cheer and often a little bit of goodwill (shows often benefit charities or host toy or food drives). Though it was raining outside the Nokia Theatre in Los Angeles on Sunday night (December 5), there was plenty of heat inside care of B.o.B, Selena Gomez, Enrique Iglesias, Travie McCoy, Taio Cruz, Far East Movement, Paramore's Hayley Williams and Katy Perry, who dressed up as a snowman in an effort to get into the holiday spirit.

Perry wasn't the only star making it happen on stage, as former "American Idol" winner Kris Allen performed during the pre-show of the Miami Dolphins game against the Cleveland Browns at Sun Life Stadium in Miami (the Dolphins lost to the Browns 13-10) and Ke$ha blew away the sold-out crowd at a club called X-Tra in Zurich, Switzerland. Click here for these photos as well as the entire "Spotted" archive, which features over 500 candid shots of stars like Britney Spears, Taylor Swift, Justin Bieber, Jay-Z, Lady Gaga, Justin Timberlake, Eminem, Rihanna, Madonna, the Jonas Brothers and Adam Lambert!