Pentatonix hit all the right notes with their performance on NBC's Wicked special. During the show on Monday night, the a cappella group put their own spin on "What Is This Feeling?" and it was nothing short of "Oz-some." Not only was the group totally in sync as they belted the lyrics to the hit number, but Mitch Grassi and Kirstin Maldonado also made the perfect Glinda and Elphaba. Seriously, can we get these two in the Broadway production ASAP? See the catchy performance ahead.