Hearing Seth Rogen say that he sang the line "it ain't no passing craze" at least 1000 times made me LOL... especially considering Hakuna Matata is the most carefree song!
I mean, it literally means NO worries! The fact that Seth Rogen was so stressed was hysterical.
I first saw the story on People but you've gotta check out the behind the scenes voice recording! Its so cool...