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.

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

David Letterman has not officially gone on record reacting to CBS’ shocking decision to cancel “The Late Show,” which Letterman started in 1993 and hosted for 22 years before passing the baton to Stephen Colbert, but his thoughts on the matter are quite clear thanks to a 20-minute supercut his team posted on the official …