Joining Trensch (Matilda, Bare), Vivino (Wicked) and Hager (How to Succeed..., Bye Bye Birdie) at the concert were Paul Castree (Young Frankenstein, 9 to 5), Jesse JP Johnson (Wicked, Altar Boyz), Veronica Kuehn (Avenue Q), Libby Servais (Wicked) and Bethany Moore (Pippin).

Here's how the concert was billed: "Many performers understudy lead roles and rehearse weekly, preparing for their moment in the spotlight. But what if their moment never arrives? On Aug. 5, those understudies finally get to play those roles for a live audience in NOT At This Performance at 54 Below."

Audiences heard songs from All Shook Up, Hairspray, High Fidelity, Into the Woods, Rent, Spring Awakening and Xanadu as well as backstage scoop and behind-the-scenes stories.

The evening was produced by Shoshana Feinstein with music direction by Benjamin M. Rauhala. Videography is by Karen Marshall.

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Taylor Trensch with Ben Thompson - "Today 4 U" (Rent):

Taylor Trensch and Ben Thompson - "I'll Cover You" (Rent):

Libby Servais - "Change the World" (Lysistrata Jones):

Libby Servais - "Where Am I Now" (Lysistrata Jones):

Paul Castree with Chris Ingrao - "It's No Problem" (High Fidelity):

Paul Castree - "It Hurts Me" (All Shook Up):

Bethany Moore - "The Witch's Rap" (Into the Woods):

Bethany Moore - "Last Midnight" (Into the Woods):

Robi Hager - "Left Behind" (Spring Awakening):

Robi Hager - "Totally F*cked" (Spring Awakening):

Donna Vivino - "Miss Baltimore Crabs" (Hairspray):

Donna Vivino - "Look Down/Little People" (Les Misérables):

Veronica Kuehn & Jesse JP Johnson - "Suddenly" (Xanadu):

Jesse JP Johnson - "Don't Walk Away" (Xanadu):

Veronica Kuehn with Jesse JP Johnson - "Suspended in Time" (Xanadu):

Veronica Kuehn & Jesse JP Johnson - "Xanadu" (Xanadu):