TV: Rejoycify with a Sneak Peek of Idina Menzel & Kristin Chenoweth Singing in A VERY WICKED HALLOWEEN!

To celebrate "Wicked's" 15th anniversary on Broadway, NBC will throw a joyous Halloween party for the ages. This televised concert featuring songs from the blockbuster musical hit "Wicked" will showcase a cavalcade of special guest stars to help celebrate the music and the magic of the show that tells the story of what happened in Oz before Dorothy dropped in.

Honoring the show's lasting cultural impact and the 15th anniversary of its unforgettable Broadway debut, the special will reunite Tony Award winners Idina Menzel and Kristin Chenoweth, the original Elphaba and Glinda, who will perform and serve as hosts for the special. Additional guest performers include Ariana Grande, Adam Lambert, Ledisi, Pentatonix and the current Broadway company of "Wicked."

"A Very Wicked Halloween" airs Monday Oct. 29th at 10PM ET/PT on NBC.

Check out a sneak peek of original witches Menzel and Chenoweth performing below!