David Letterman unloaded on CBS and Skydance on Friday for cancelling “The Late Show,” which he launched 32 years ago, saying the network had mistreated his successor, Stephen Colbert. In an interview posted to his YouTube channel, Letterman said he does not buy the official explanation that the show was cancelled for financial reasons.

David Letterman has finally given his opinion on the cancelation of The Late Show – the franchise that he founded.

Now that The Late Show is coming to an end, here are 7 times Stephen Colbert stirred up controversies as a "joke.