What are the 2 songs that make up El Tango de Roxanne in the movie Mouline rouge?

I know that Roxanne by The Police is one of them, but i want 2 know
what the song and artists who did the lyrics that Ewan Mcgregor
sang..... i have looked everywhere and can't find it. Was Ewan's
lyrics specially made for the movie, or is it a real song??? Help me
people!!!!! Please?