In short: with really old photos and with Photoshop. That’s how she got “thin fast.”
Khloe Kardashian also covers Life & Style Magazine, with a story only tangentially-related to the reported marriage breakdown. Although, unlike People Magazine’s exclusive, Life & Style’s is just a fabricated, nonsense diet story.
The Life & Style cover reads: “(Before: sad and bloated) Khloe: How I Got Thin So Fast. 20 lbs in 20 days; Easy, tasty food; Her flat abs secrets. Khloe gained weight as her marriage crumbled. Now she’s quit her show and tells Life & Style how she got happy and trim again.” Kardashian didn’t lose 20 lbs in the last 20 days, that isn’t a real quote on the cover, and there’ve been no other reports of her gaining stress-weight aside from this one. And, again, the show’s on hiatus it’s not cancelled.
The “before” photo is generally unflattering, and it’s from an indeterminate date (there’s a reason there are never dates on tabloid before and afters, it makes misdirection impossible). The “after” photo appears to be from the QuickTrim diet pill promotional campaign in 2009 or 2010, if memory serves. Or, possibly, an old Life & Style bikini shoot from the same period (it’s hard to pin down, since Kardashian wears a lot of samey purple bikinis). But the “after” photo was quite possibly taken before she got married.