According to http://tvbythenumbers.zap2it.com/2013/02/08/christina-applegate-leaving-up-all-night/168854/, Christina Applegate has left the show for good. I can't believe NBC would want to replace her as she is the star of the show. Plus, the last episode of it hit series lows. How can they move on with the show? They need to stop cheering on this show and concentrate more on Community which premiered way better.