if you're talking about songs which when you hear them bring certain films immediately to mind,I have a few to start with.
An excellent and bizarre music/movie scene was in the Coen brothers Millers Crossing,where there was a violent gangster shootout,all Tommy guns a blazing,to the tune of O' Danny Boy (or Londonderry Air,whichever title you prefer).One of my favourite Coen scenes,of which there are many.
And of course Steelers Wheel,Stuck In The Middle With You,which was the backdrop to the infamous so-called ear slicing scene in Reservoir Dogs.
Cheesy 80's classic Love Is In The Air always makes me think of the equally cheesy (but can't help but like it) Strictly Ballroom.
And is there anyone who doesn't instantly think of the 'pottery' scene in Ghost (the most gratuitous phallic symbol scene ever!


),when they hear Unchained Melody?
I also agree with the afformentioned Mad World/Donnie Darko collaboration.When I first heard the song on the radio I hated it,but after watching the film I absolutely loved it.
