Basically any Oldie. My dad and I used to listen to the Oldies 104.3 in Chicago when I was young. Our favourite was... crap, I can't remember it now. Must google.
Although apparently when I was really little and I'd wake up in the middle of the night crying and wouldn't go back to sleep, he'd put me in my car seat in the back and drive around playing country music. o.o "After 10 min it would get very quiet, I'd look in the rearview mirror and you'd be sound asleep."
AHAH! It was Doo Wa Diddy...
I used to love that song, man. Back when I was like 5. 
EDIT: Now I have ^this^ song stuck in my head.
Although apparently when I was really little and I'd wake up in the middle of the night crying and wouldn't go back to sleep, he'd put me in my car seat in the back and drive around playing country music. o.o "After 10 min it would get very quiet, I'd look in the rearview mirror and you'd be sound asleep."
AHAH! It was Doo Wa Diddy...
I used to love that song, man. Back when I was like 5. EDIT: Now I have ^this^ song stuck in my head.