I heard a song on an advert not to long ago and i just cant find out what the name of the song is or who sings it. Its kind of like a psychedelic hippie song. I cant remember the words just that some one basically goes aaaaaaaaahhhhhhhhhhhhhhhhhhahhhhhhhhh alot.
From your description I couldn't even make a guess but I suggest you try the wesite www.songofthesalesman.co.uk
you're bound to find it there. Good luck