I'm in love with SNL. It is such a part of our social and pop culture fabric. Think about it, it's been over 40 years of celebrities, comedians and iconic TV moments. The one thing you don't want to be on SNL is boring. With that pressure in mind, artists hosting or even musical guests are always trying to stand out. Sometimes an appearance is epic and sometimes it's an epic fail, either way it's amazing to watch. Here are the top 10 celebs you never knew were banned (or simply have never been invited back which is code for banned) on the legendary SNL and what they did to earn their "no book" status: