This week, our favorite stars were all about having fun. From Jimmy Fallon playing dress up alongside the Jonas Brothers to TV stars goofing around on set, or just looking great on set (we're talking Kate Hudson on Glee), everyone was having a good time. There are also cool shots of movie stars like Channing Tatum and Mark Ruffalo getting down to business. You won't want to miss them, so get clicking to check 'em out.
— Additional reporting by Lisette Mejia