NBC teamed up with the Broadway smash 'Wicked' to celebrate its 15th anniversary. They aired 'A Very Wicked Halloween' with performances from the show's original stars, Kristin Chenoweth, Idina Menzel, and even had a guest appearance from Ariana Grande.
Every time I hear Idina Menzel sing 'Defying Gravity' I get goosebumps. And Ariana absolutely slayed her performance. You have to check these out. Oh, and you can't miss the performance featuring every person who has played Glinda and Elphaba over the years.