Since it's opening last spring, How to Succeed in Business Without Really Trying has seen a rotating cast of heartthrobs step into the role of J. Pierrepont Finch. While Daniel Radcliffe had the honor of originating the role and performing on the Tony Awards stage, and Darren Criss kept NYPD officers gainfully employed, Nick Jonas has been hitting his marks for the last three weeks, taking over the reigns with fellow newcomers Beau Bridges and Michael Urie. To further promote his run—he's here until July, folks—Jonas stopped by Late Night with Jimmy Fallon to help kick off the show's Broadway week. Master drink-thrower Anjelica Huston taught Fallon what Smash is all about, but it was the younger JoBro—looking like a mix between aspiring Wicket executive and '60s lounge singer—who demonstrated the pipes that landed him the role of Finch, as well as previous gigs on Broadway and the West End. Jonas recently recorded a new EP featuring selections from the Tony Award-winning revival. Check out his take on "I Believe In You" below.