Lea Michele , Chris Colfer, and Mark Salling  hit the mall yesterday , but the Glee  stars weren't engaging in any retail therapy. Instead, they were shooting the latest episode of their hit show and belting out a tune on their way down an escalator. It's been a hectic month of taping  for the castmates as producers consider lengthening the upcoming "Born This Way" episode to 90 minutes  instead of the usual 60. Many of the series' actors are still busy pursuing other projects despite the long hours. Mark and Chord Overstreet are two of the newest spokesmodels for OP , and Lea Michele recently spent time in NYC filming her big-screen role in New Year's Eve .