Just use some affirmations.. For ex "i am confident in my work" and repeat them every day..

when you know you are helpfull for others,you will feel confident.

Thinking that you're special..although you not beautiful like Angelina Jolie just think that you're still special and keep smile. Sometime smile can cover you're shy. With your smiling everybody think you're comfort with yourself so people will comfort with yourself too.. ;-)

just think about what you have.

Shyness is very often something that has been caused by low self-esteem, which in turn leads to nonexistent self-confidence. And anyone who tells you that "that's just how she is", has no idea of what they're saying. Last time I checked, you could learn things and get better at things, without essentially changing into someone else. The critical part is that the person must be willing to change. If you doesn't want to change, it won't happen. The thing is, if you understands how nice it is to get rid of shyness, you'll gladly accept the change and work for it. And it's your job to make you see why you should do it. Good luck!