The first one I bought myself was "Synchronicity" by the Police. (Still one of my favorites).
Before that, I had to listen to whatever my sisters or my mom had on.
My mom loved having music playing, her favorites were The Mamas & the Papas, Harry Chapin, Jim Croce, so that was kind of cool.
My best friend's mother had "Liza with a Z" by Liza Minelli and we used to love listening to that at her house!
I also remember my mom buying me the Laverne & Shirley theme song on 45. I loved that!