She does look anorexic I agree. For me though it's less about her limbs and more about how pronounced her collar bone is here. You rarely see it so bold in people of healthy weight nor should you be able to see the whole thing extending all the way to the shoulder unless you have a dangerous 1% body fat.
She has nice long legs like a true dancer but I notice that the bottom half of the legs is shorter than the top. Usually they should be about equal length.
The hands are drawn very elegantly though I note.