Camila Cabello was on with Jimmy Fallon last night and told a hilarious story about dressing up as a grandmother for Taylor Swift's Halloween party last year.
They showed a photo from the party of the likes of Taylor and Gigi Hadid....and Camila with curlers in her hair and a big dress rocking the "fat grandma" look, as she calls it.
She told Jimmy that the slightly unusual outfit didn't last the whole night, though.
Watch her tell the full story as well as her family's reaction to new single "Havana" right here:
We're not sure it'll be one of the top outfit choices for 2017 but she definitely pulled it off!