From 1959 one of the dreamiest songs ever "Sleep Walk" by Santo and Johnny.
Of course you need a proper vintage prom dress to sway around in while listening to this song! I found these fabulous beauties on Etsy and Mainstreet Mall -
Size small from Smash Meringue $145
Size x-small from Linda Wink's Bad Girl Vintage $135
Size x-small-small from Wacky Cats Vintage $145
Size small-medium from Damn Good Vintage $85
size small also from Damn Good Vintage $150.95