Last night on the Late Show, Alec Baldwin dropped his pants to flaunt his weight loss, and addressed that whole paparazzo punching incident — He did not punch the photographer; he was merely curious as to the camera's aperture setting. Plus: Kate Upton taught Jimmy Fallon how to "cat daddy" — "You have to buckle your seat belt and then roll your wheelchair." Fallon got it eventually. Well, kinda. Also, Andy Samberg and Jay Leno kissed in a spoof of Samberg's Harvard Class Day spoof in May. Furthermore, the former SNL cast member would like to clear the air: His name, per Wikipedia, is not David Andrew Samberg nor was he born in Mill Valley, California, as lovely as it is. And, revisiting his old set on the Daily Show, Steve Carell brandished his illustrious but nonexistent books, including an anonymous exposé on "working for late night's cruelest boss." Watch our compilation to see what you missed.