This reminds me of the time Lorne Michaels went on Saturday Night Live to invite the Beatles to reunite on SNL.

Except in this case, Diddy really did promise on New Year's Eve to attend the monthly Chris Gethard Show at the UCB Theatre, and here we are nine months later, promise yet-to-be fulfilled, and Gethard is the star of a Comedy Central sitcom (Big Lake) and guesting on Late Night with Jimmy Fallon. Fallon even told his TV viewers and Twitter followers to ask @iamdiddy to follow through, with the hashtag #diddygethard. Gethard's next UCB show is Sept. 18. The gauntlet has been thrown. Your move, Diddy.