Good old-fashioned airbrushing
(In light of Ace's commentary, I'd like to point out that it's possible that the "modified" photograph is merely the result of an inept attempt to "squeeze" it to fit into a particular print format, rather than being a deliberate slimming. Knowing the history of Madison Avenue airbrushing, though, I'd still tend to defer to Occam's Razor to explain the manipulation. And, for the record, that's two Wikipedia links in one sentence! Talk about nuking my own credibility!)
UPDATE 30-AUG-2006 14:09 EST: Har har!



