Jimmy Fallon, Whoopi Goldberg Swap Mouths In ‘Lip Flip’ On ‘Tonight Show’, Comedians Perform Duet Of ‘I Knew You Were Waiting (For Me)’

Ever wonder what it would look like if Jimmy Fallon had Whoopi Goldberg's mouth, and vice versa? Well, first ... why? Second, you're in luck because on last night's episode of The Tonight Show Starring Jimmy Fallon the legendary EGOT winner stopped by and played a little game of "Lip Flip" with the talk show host.

We must warn you ... it's a tad disturbing at first. But stick around; it gets hilarious.

The bit began with each comedian doing "impressions" of each other – Goldberg beefing up an Irish accent for Fallon and the Tonight Show host giving The View cast member ... some kind of accent (or a mix of accents) ... hard to tell.

The two drifted their hilarious conversation towards music. And since Fallon has the legendary Roots crew there backing him up whenever needed, he asked the group – well, technically Whoopi did, we guess – to help them out on a duet by playing George Michael and Aretha Franklin's "I Knew You Were Waiting (For Me)."

As the two went into the chorus of the number, it appears the accents dropped completely, but that's okay, they both continued to completely rock the performance!

Goldberg's appearance on The Tonight Show was in order to not only promote The View, which is going through some rather public casting changes (with Rosie O'Donnell possibly coming back), but also to promote the brand new Teenage Mutant Ninja Turtles, opening on August 8.