Jimmy Fallon, Ariana Grande’s Lip Sync Conversation Is a Must-See

Ariana Grande really knows her Top 40 hits! The superstar rattled off a bunch of popular songs during a hilarious Lip Sync Conversation with Jimmy Fallon during The Tonight Show on Monday, April 25.

The late-night host, 41, exchanged friendly banter with Grande, 22, backstage. The pair said their hellos, shared throwback photos with each other and, err, got into a bit of an argument. But to ease the awkwardness, they pretended to belt out the lyrics to recent pop hits.

Andrew Lipovsky/NBC/NBCU Photo Bank

"Why you gotta be so rude," Grande said, referring to MAGIC!'s 2014 tune "Rude."

Fallon, a Justin Bieber fan, quipped back: "Is it too late to say sorry?"

The twosome also revealed their weekend plans. Fallon is headed to Home Depot and hopes to swing from a "Chandelier" — like Sia. As for Grande? She's going to the beach because, like DNCE says, there's always "Cake by the Ocean."

Other songs that Fallon and Grande pretended to sing included Beyoncé's "Sandcastles," Meghan Trainor's "No" and 'N Sync's "Bye Bye Bye."

Watch the video above for more!

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!