Zac Efron, Conan O'Brien Sing The Beach Boys' 'Barbara Ann' On 'Conan'

On "Conan" Monday night, Zac Efron and Conan O'Brien collaborated on a cover of The Beach Boys hit "Barbara Ann."

"[My friends and I] could sing a good barbershop quartet," Efron told the host, remembering a trip his drama class took to Paris. "So we started singing a cappella songs ... By the time [our drama teacher] came back, we'd stopped the entire Champs-Elysees ... We were these goofy, dorky Americans singing Beach Boys."

Without further ado, Conan proclaimed they should sing the classic Beach Boys tune "Barbara Ann" together, and the song went off without a hitch, Conan high notes and all.

Efron recently voiced a 12-year-old boy chasing the girl of his dreams (voiced by Taylor Swift) in the box office hit "Dr. Seuss' The Lorax."

"It was incredible, so much fun," Efron told OnTheRedCarpet.com. "It was pretty easy, I just had to play a 12-year-old kid, so I was just myself."

What do you think of Conan and Efron's "Barbara Ann" attempt? Did they pull it off? Let us know in the comments.