My Voice is very sqeaky and im embarrased to talk on the phone or sing is there any excercises to change you voice?|||yes do voice ups every other day|||All you can do is work on it. If you think its too squeaky try opening your mouth more,and pushing your tongue down as you speak.
Also, if you hear a voice that is particularly nice, try to imitate it. After a while you will be able to use it well.
I had a very nasally voice,and learning how to change the position of my tongue when talking really helped.