Ariana Grande appeared on The Tonight Show ahead of the arrival of Wicked : For Good and took the opportunity to showcase a brief history of famous duets with host Jimmy Fallon . The duo rolled through a series of duets, including Wicked musical number “For Good,” Marvin Gaye and Tammi Terrell’s Ain’t No Mountain High Enough,” Lady Gaga and Bradley Cooper’s “Shallow,” and Brandy and Monica’s “The Boy Is Mine.” Their performance spanned both Broadway and film, including animated flicks like