The talk-show host performed the alt-rock classic on the latest episode of her show.
The singer appeared on Good Morning America to discuss playing a Disney princess.
“Here It Is Christmastime,” with Old 97's, debuts on three charts.
"They were giving me medicine between takes because we were waiting on the positive result,” explained the 20-year-old actress.
The winner will be crowned on Tuesday's two-hour episode.
The small taste arrived days after the singer first teased his involvement with the movie.
Meanwhile, all three of John Legend's team members were in the bottom four.
The late actress appeared as Baby Mammoth on this spring's season 7.
SHOWTIME called the series the most-watched premiere in its nearly 50-year history.
Monday night's top 8 performance brought the house down.
