Maybe the first question is
how to define a favourit song...
Just I have enormous favourite songs..!
But the majority of them moves in my hitlist very quickly, this month - one song, next month it's another one.
Favourite songs, I answer here, the songs that don't depend on time. No matter what time, place, mood you simple always say this song is great.
Such as for me
One, of course
Shape of My Heart (Sting!!!)
and some others (difficult to remember all at once!