The concert will feature performances by Constantine Rousouli (Ghost, Hairspray), Allison Blackwell (Porgy and Bess), Julia Mattison (Godspell), Delius Doherty (Book of Mormon), Jen Noble (Ghost), Garett Hawe (Newsies), Carly Hughes (Ghost), Stephen Mark Lukas (Book of Mormon), Corey Mach (Godspell), Matthew Marks (Book of Mormon), Jack Scott (Newsies), Brendon Stimson (Newsies), Julius Thomas III (Porgy & Bess) and Laurie Veldheer (Newsies).

Shoshana Feinstein produces the event that gives the audience the chance to vote on which song the actors will sing, giving the performers just a few moments notice to prepare themselves to take the microphone.
Read more about the concert here.

Here's a look at videos of actors Brendon Stimson and Jeremy Jordan; Constantine Rousouli and Richard Fleeshman; and Jen Noble and Caissie Levy as the understudies prepare to go on!

Ghost's Jen Noble and Caissie Levy

Ghost's Constantine Rousouli and Richard Fleeshman

Newsies' Brendon Stimson and Jeremy Jordan