It'd be a little difficult to redline a drawing so small. Some things you could fix:
I find it a little odd that the legs are in 3/4ths and the rest of the body is in profile. At first I thought that the leg behind her was raised, but the feet are at the same place, which would make one leg longer than the other.
The limbs also seem a little stiff. Try looking up reference photos of real people with their limbs in those positions, and pay attention to what the muscles are doing under the skin. I think it looks a little stiff right now because you've tried to make everything perfectly symmetrical, whereas in real life there is a small variance. Try drawing in the muscles under the skin to get a feel for which are contracted and which are at rest at different times.
I really like the expression and the spunk you put into the character. It feels like she's a pop singer... I thought she was pretending the staff was a mic. :{)