James Corden picked up Chris Martin on his way to the Super Bowl for another round of Carpool Karaoke, Jimmy Kimmel brought together the cast of "E.R." including George Clooney, and Stephen Colbert gives his best recap of the Iowa Caucuses winners.
A few weeks from now, the late-night TV landscape will look drastically different, what with current 'Late Night' host Jimmy Fallon taking over 'The Tonight Show' from Jay Leno, while 'SNL''s resident Weekend Update anchor Seth Meyers graduates to 'Late Night' in turn. The first promos for these takeovers have emerged, but will everything be ready in time for opening night?