That's one I can do in my sleep ...... and sometimes, it's tough NOT to !
The original cut with Stan Getz is one of my favorite sax pieces, but it's a bore to sing (yawn). Pretty melody, though. Most guys I know play it in F, but I've seen it in fakebooks in G. Makes sense that it is in the lower key for Stan's tenor, but I'm really not sure. I never checked the original.
See if this link works: http://www.so.estec.esa.nl/~dkoschny/Thetbds/scores/The_Girl_from_Ipanema_-_Lyrics_and_chords.pdf