This is hard to explain. I heard it over someone's microphone in Counter Strike and I really liked it.
All i can remember is that there is both a man and a woman, The woman sings the chorus for the most part and the guy sings the verse, the music itself has a 1950s influence, and the girl keeps the theme, while the guy raps when it's his turn. That's about all i can remember. It was in English and I heard it in the USA.