You can sometimes shade with pink to give your character a more "cute" look as it makes the base skin colour pop and look less grey. The artist used too much red thou but that's a pretty common mistake or as some would call it "style choice". I do agree with you nonetheles. With that kind of skin colour a more standard shading would fit better.
For the sake of sanity, lets assume this is after they have each reached legal age. No 14 year old pinups (also, WHY did they have to choose the youngest princess to be the friggin pinup. I suppose it could be worse, Pocahontas was 12)
.............. snap
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snap snap snap
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I'd rather do that.^
Gross.
As was Ariel