Watch Demi Lovato Imitate Fetty Wap, Christina Aguilera on 'Tonight Show'

In addition to hosting the much-anticipated duet between Lauryn Hill and the Weeknd, Jimmy Fallon sat down with Demi Lovato to play another round of Wheel of Musical Impressions, where the two combatants face off to sing nursery rhymes in the unique style of a picked-at-random vocalist.

In the first round, Lovato does…