Whats the name of that one song in the 80s movie where that guy held a sterio above his?

And I'm sure a bunch of u people born in the late 70's who are truly stuck in the 80's know exactly which movie and song I'm refuring to. This guy hold's the sterio above his head because he's in love with a girl and he's trying to profess that love through an enchanting song... by the way. (But u already knew that, didn't ya). Thanx for the help guys.