“Meg Donnelly is my idol and she has an amazing voice,” Mills shared with POPSUGAR. “It was so surreal to sing with her, it felt like a dream.” It also just so happens that Kia’s voice is equally as insane, and their performance just might be your new favorite rendition of the iconic song. POPSUGAR has an exclusive sneak peek of their performance in the video above, and you can watch it all go down this Sunday, Dec. 6 at 7 p.m. ET on Disney Channel!
Image Source: Disney Channel