If you're obsessed with all things musical theatre, then you better sit down for this one. On Monday night, Tony award-winner Neil Patrick Harris stopped by The Late Late Show to challenge host James Corden in a special edition of "Broadway Riff-Off." While the A Series of Unfortunate Events actor lit up the stage with his sparkling personality, we have to admit, James really blew us away with his rendition of "On My Own" from Les Misérables. Of course, the best part of the whole segment had to be when they busted out some rhymes from the Broadway hit Hamilton. Watch the whole thing above to see if you can decide on a winner.