I'm about to go crazy over this song, about 2.24 into the the song there is a clip from an old 50's of 60's song i think, a chorus. I have been wondering for moths what song that clip is from, I know it's a song i heard in my childhood and i can't find it anywhere, does anybody know? (it's the "Oooooo-aye-aye-aye-aye" part)
...and to answer your question, I'm pretty sure the whole song is original, I believe they may have copied some of those bits from old 50s songs.
The bit you're talking about really reminds me of one or two tracks from the Grease soundtrack album.