I was lucky enough to be raised by a guy who had a solid appreciation for a bossa nova. This is why we listened to a lot of Antonio Carlos Jobim, the veritable godfather of the genre, in our house.
Bossa nova is a beautiful melding of samba, folk and imported American jazz. Middle and upper class students and musicians in Rio mixed samba, which sprung from Brazil's impoverished favellas, with cool jazz in the context of a worldwide late 50s/early 60s folk movement. Even if you're unfamiliar with the sound, you've probably heard the classic bossa nova hit, sung by Astrud Gilberto and penned (again) by Jobim, "The Girl From Ipanema."
It's so hard to choose just one Jobim-penned song, as so many of them are phenomenally good. This wasn't one of my favorites as a kid, but at some point in my early 20s, it became one. There are a few different versions. One instrumental features Brazilian jazz legend and frequent Jobim collaborator, Stan Getz. This one is sung by Ella Fitzgerald.
They'll be no desafinado
When your heart belongs to me completely
And we won't be slightly out of tune,
You'll sing along with me.