Tina Fey and Tituss Burgess slay a musical-theater duet during the Miscast Gala

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Tina Fey and Tituss Burgess Perform a Duet at the MCC Theater's Miscast Event in NY

It's safe to say, we had NO clue Tina Fey had the Broadway voice of an angel.

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Tina Fey joined her "Unbreakable Kimmy Schmidt" star Tituss Burgess on stage for a stellar rendition of "You're Nothing Without Me" from "City of Angels" at Monday's MCC Theater's Miscast Gala. Of course, they nailed it. What more do you expect from the team behind "Peeno Noir"?

If this is any inclination of what "Mean Girls: The Musical" is going to look and sound like, sign us up!

Check out more from Tina Fey in the gallery below!

36 PHOTOS
Tina Fey's Style Transformation
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Tina Fey and Tituss Burgess slay a musical-theater duet during the Miscast Gala
Tina attends the 2002 New York Magazine Awards in all black.
Tina attends the 55th Annual Primetime Emmy Awards in a deep-v olive gown with sequin embellishments.
Fey wore this flowy two-toned dress to the world premiere of "Mean Girls." 
We're loving the pop of color on Tina's shoes at the Nantucket Film Festival, a perfect accent to a simple black dress.
Tina attends the New York premiere of "The Village" in a silk top and wide-legged trousers.
Now that's a statement jacket! Tina attended The Mark Twain Prize for American Humor in a bold metallic coat.
Tina wears a pop of turquoise under her suit at the Do Something BRICK Awards.
The look on Tina's face seems to be saying "yes, I'm wearing yellow shoes. And yes... I know they're awesome."
Tina chose a basic white blazer over her navy dress to attend an opening night on Broadway.
We think green is one of Tina's favorite colors, here at the Primetime Emmy Awards.
Fey looked lovely at the Golden Globes in this black lace tea-length dress.
It's not as intense as Angie's leg at the 2012 Oscars, but Tina shows a little skin at the Emmys.
Fey is a classic beauty in this little black dress and nude heels, holding her SAG award.
Tina matched her red lips to her shoes at Comedy Central's "Night Of Too Many Stars" benefit for Autism.
Fey attended the 2008 CFDA Fashion Awards in this metallic strapless dress and matching strappy sandals.
Tina looked elegant in this mint green dress at the Television Critics Association Awards.
Fey was a showstopper at the 60th Annual Emmy Awards in a strapless, slim-fitting purple David Meister gown.
Short and sweet for the Screen Actor's Guild Awards.
Tina channeled Oscar himself in this metallic Zac Posen at the Academy Awards.
Tina has mastered the art of menswear-inspired outfits, and she looked gorgeous at the 2009 Creative Arts Emmy Awards.
A little rain doesn't get the stars down! Tina looks happy and elegant at the Golden Globes.
Looking positively royal in this purple Salvatore Ferragamo at the SAG Awards.
Fey looked gorgeous in this floral Dolce & Gabbana dress.
Fey wore a strapless jumpsuit to the 2010 Met Gala, themed "American Woman: Fashioning A National Identity."
Tina wore this intricate Oscar de la Renta gown to the Primetime Emmy Awards.
One of our favorite looks for Ms. Fey was this short Oscar de la Renta dress with a lace top.
It seems Tina has a favorite designer, choosing Oscar de la Renta again.  We can't say we blame her -- this dress is gorgeous, too!
Casual in stripes, Tina attends the NBC upfronts in jeans and a blazer.
Fey chose a simple navy dress for the 2011 American Museum of Natural History gala.
Tina's tulle, strapless magenta gown for the Golden Globes was another Oscar de la Renta creation.
Black is definitely one of Tina's faves to wear (what woman doesn't love black?) -- and we love her tendency to wear lace overlays.
Tina wore this strapless Vivienne Westwood to the Emmy Awards in 2012.
Glittering in gold, Fey attended the 35th Kennedy Center Honors.
Tina went with old Hollywood glam here, dressed in a belted, sweetheart Oscar de la Renta gown.
Tina looked cheerful in cobalt to celebrate her new film, "Admission."
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