Ariana Grande Has Lip Sync Conversation With Jimmy Fallon on 'Tonight Show'

NBC

See which new Beyonce song she 'sings.'

And we thought Lip Sync Battles were hard! On Monday night’s episode of The Tonight Show, Ariana Grande palled around with host Jimmy Fallon in a “Lip Sync Conversation” skit.

The “Dangerous Woman” singer, 22, was sitting in a dressing room when Fallon popped his head in, lip syncing “Ooo, ooo, it’s just me myself and I,” the lyric’s to G-Eazy’s “Me, Myself & I.”

WATCH: Ariana Grande Embarrasses Her Nonna on ‘Tonight Show’

The pair continue to have a discussion about the day’s events, with Grande posting a throwback photo and singing, “Once I was 7 years old!” and expressing a strong desire for some “cake by the ocean” while building (Beyonce’s) “sandcastles”!

But when Fallon yells at the singer, she declares, “Why you gotta be so rude?” to which he responds with R. Kelly’s, “Now I’m not tryin’ to be rude.”

“What do you mean?” Grande asks Justin Bieber style.

“Is it too late now to say sorry?” Fallon replies.

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Earlier in the evening, Grande embarrassed her grandmother on the show, when she revealed that her “Nonna” had a crush on the host. Fallon made her dreams come true by giving her a hug in the audience.

This certainly isn’t the first time the Nickelodeon alum has appeared in a Tonight Show skit. Back in September she wowed with the “Wheel of Musical Impressions,” doing a spot-on impersonation of Christina Aguilera.