However, after the bridge of the song, she took a quick break from her current hit to throw things back… all the way to the 1990s!
The blonde beauty belted out a bit of TLC's chart-topper No Scrubs, but the nostalgia didn't stop there! The 22-year-old also tackled Ready Or Not by Fugees, before finishing out her own song.
After her surprise medley, Tori handed the reins over to opera singer Andrea Bocelli, who sang his classic aria Por Ti Volare!
And last but not least, the two closed their set with a little duet! The musicians took on Just Give Me A Reason by Pink and Fun.'s Nate Ruess.
While it seemed like a pop ballad might have been a little bit out of the 57-year-old's comfort zone, the peculiar pair performed beautifully!
Sure, it might seem a little weird that a classic tenor and a modern artist teamed up for the awards show, but this actually isn't the first time Andrea joined forces with a mainstream powerhouse!
Ch-ch-check out the rest of their AH-mazing performance (below)!!!