Unknown song, don't know artist

I was in Hollister and heard this song but never got the name or the artist, and i can't find it through google or yahoo yet. It's an alternative song and the only lyrics i know are:

"singin oh ohhh singin oh ohhh singin ohh ohhhhh ohhhhhh" and at some point in the song there are the words "hero" and "zero" in consecutive lines (rhyming)

PLEASE HELP!

The song is "Perfect Situation" by Weezer. It's on the album Make Believe.