The Smash star will perform songs that have defined his swift rise to stardom.
The Smash star shares her favorite memories of overcoming technical mishaps, bonding with her costars, and blaming everything on an imaginary actress named Heather.
Guests also included Lauren Pritchard, Drew Gasparini, and more.
The fictional musical takes the stage at 54 Below on Sunday and Monday.
The score of the Tony Award-winning (fictional) musical will be sung on December 9 at 54 Below.