Tina Fey, Colin Farrell, Dax Shepard, and More Stars on Set This Week!

Stars left their holiday vacations to get back to work on fun and exciting projects this week. Tina Fey did a funny skit on the Late Show to promote 30 Rock in NYC. In LA, Colin Farrell rolled out of bed and onto the set of Seven Psychopaths, and across town, Dax Shepard and Peter Krause goofed around between scenes of Parenthood — click through to see who else was on set!