Comedian, game show host, and improvisational musician Reggie Watts spends five nights a week as band leader for The Late Late Show With James Corden. In his time behind the mic, he’s seen hundreds of guests walk through The Late Late Show doors and chat it up with Corden to varying degrees of success. We talked to Watts about the trick to being a great guest and why Helen Mirren is the queen of The Late Late Show battle rap segment, Drop The Mic.