Lovato looked surprised at her own ability to channel Fetty Wap, though she seemed to relish the opportunity to channel the diva-licious Aguilera.
“Fetty Wap? That’s a great one! Who does a Fetty Wap?” asked Fallon, who was clearly impressed. “I didn’t know I could until now,” Lovato said with a laugh.
Fallon, for his part, was no slouch, tackling “Mr. Rogers’ Neighborhood” as frog-throated Louis Armstrong and “I’m a Little Teapot” as Dave Matthews.
Watch the video above and let us know who you think won this round of “Wheel” in the comments section below.