I am a big fan of songs by Antonio Carlos Jobim and Vinicius de Moraes. You might know the song “Garota da Ipanema” (The girl from Ipanema – this is a great performance by Frank Sinatra and Antonio Jobim from 1967) which is probably their most famous one.
“Insensatez” is one of my favourite songs. This here is an absolutely stunning video and performance of Fernanda Takai, a Brasilian singer.
If you would like to see Antonio Jobim perform the song himself, you can do so here (there are tons of great videos of that song).