I forgot the name of the song but I swear I have heard this with vocals, I'm thinking it was Brian singing.. maybe it's on one of those bootleg cds that features the early years of the beach boys or from one of the recent copyright cd's that they released the pat couple years ,it sounds VERY familiar. it also sounds like what evolved into "Pamela Jean" and "car crazy Cutie". I know that I have heard this before though....unless there's another song with Brian singing that is very similar to this..
That was my first thoughts as well! It sounded to familiar! But yet I cant come up from where i heard this or something like it before? Hmm
Maybe Pink Champagne tunred into a different song like that???