Sing More?

What do you feel if you were asked to sing on stage?

Do you say "No way." And you get butterflies in your stomach?
Or do you say "OK, give me the mic."

Professional singers sing for money and fame. They are trained to sing, to dance and to entertain right from birth.

Amateurs sing and hope to be part of the American Idols. (Although at times, the look gets more points than the voice.)

What about casual karaoke singers? Why do you sing? Is it to torture your fellow karaoke buddies or to overcome your personal fear of being in the lime light. Or so to improve your singing skill by singing more? After all, they do say "practise makes perfect."

But does singing more really improves your singing?

I have tried singing to the song playing in the radio. I can't give the pitch. I have tried, honestly I have. But my vocal cord simply refuse to hit that high note. What can I do? Squeal more to perfect it?