Quite honestly, this is less about being Photoshopped into impossible beauty than it is about being Photoshopped into looking impossibly like a plucked emu posing with a purse:
[Click to embiggen.]
I'm not sure exactly what's going on there, but my best guess is that her upper arm was slightly elongated and part of her inner forearm was Photoshopped away to make the purse more visible. Possibly not putting a black purse against a black dress and a black background would have been a better idea.
I'm wondering how long it will be before women in fashion adverts just don't resemble human beings at all anymore. Maybe they should just chuck these high-priced models, start using the Svedka Sexbot, and be done with it.
[H/T to Photoshop Disasters. Impossibly Beautiful: Parts One, Two, Three, Four, Five, Six, Seven, Eight, Nine, Ten, Eleven, Twelve, Thirteen, Fourteen, Fifteen, Sixteen.]