Check out the full version of Susan Boyle in the semi finals which she won! i had a you tube clip here and it has been disabled. I think the beginning of the 7 minute version is important as she shares more about her life and her struggle to overcome her disability and prove that her life isn't "worthless," that she can contribute.
Yes Susan you are contributing to more than you realize!
I have begun to pray that her choice of the song she will sing in the final is absolutely perfect for her.