Zac Efron Gets Jazzy With Conan O’Brien [VIDEO]

Continuing on his press tour for The Lorax, Zac Efron stopped by Conan O’Brien last night, and things got musical.

O’Brien and his house band convinced Efron to join them in a rousing rendition of the Beach Boys’ “Barbara Ann.”  Efron and the boys did a swell job, but O’Brien totally f’d it up.  Know the lyrics, dude!