NOT a clown!

I'm the one who falls stumbling down
standing up at last with a little frown
Some people think of me as a clown
Crazy enough to wake up at dawn
Cause I forget the age, sing a childish song
Cause am sad and silly all life long
You know, they are wrong!
Working faster than their brain is their tongue
Deep inside me lives a girl crying all night long
But if pause and listen,
I might hear the bird of happiness
Singing me a beautiful song.