Lea Michele, Heather Morris, Dianna Agron, and many of their Glee costars were decked out as zombies to film in LA yesterday. The McKinley kids underwent a huge transformation for their epic post-Super Bowl episode, which is an homage to Michael Jackson's "Thriller" — check out Buzz's sneak peek of their ghoulish song and dance routine. In addition to their costumes and makeup, there's more excitement to come this season from the show's creator, Ryan Murphy, with planned cameos from Oscar cohost Anne Hathaway and fan favorite Gwyneth Paltrow. Many cast members were back to work after a weekend jaunt to Las Vegas, where birthday girl Naya Rivera celebrated her big day and apparently got cozy with star quarterback Chord Overstreet. Dianna missed out on the wild times, though, to stay behind in California for her I Am Number Four's press junket.