Increasing musical range

How do I increase my range? Oh, and what are some vocal exercises? Thanks.

la la la la la!!!

listen to yourself sing, maybe in your bathroom so you can hear the echo, or record yourself and play it back to see what you need to work on.
also learn to breathe the correct way..
sit stand or lay down straight as you can.
put one hand on your chest, and one on your stomach to see which hand rises more.
if your chest rises more, then you're breathing wrong.
and it'll take lots of time to fix this, but practice breathing through your abdomen ((or stomach I guess)) and it'll help your voice sound better ^_^
it really does work!!