WATCH: Taylor Swift tries beatboxing with LL Cool J

"This is going to be terrible," Taylor Swift said before attempting to beatbox at the opening of Wednesday night's Grammy Nominations Concert. She wasn't wrong, but it's not every day you see a country-pop princess laying down some rhythm. After some coaxing from co-host LL Cool J, who promised, "I can't sing, so we're even," the 22-year-old beatboxed to his rendition of her song "Mean."