The red shirt is very like the on her book - but is NOT the same one...so, did Newsweek pull a photoshop, putting her head on someone else's body?
I checked Sarah's F - and her last entry was yesterday, commenting on the outrageous Gitmo/NYC insanity.

...
Look closely - the shirt is very similar - but not the same, which leads me to believe it's a deliberate photoshop - not the first time this kind of low life stunt has been pulled. And what on earth is that in 'her' hand?

oops -
“I checked Sarah’s FB...”
The picture is legit. It was one of the pictures in Runners World’s interview with Palin. I believe NEWSWEAK will be an epic fail. The fact is, most people don’t much care for either party, so being “bad news” for both of them will actually be seen as a good thing. When Runners World featured Palin on their cover, they sold 7 times as many magazines as normal on the newsstands. When TIME featured her a few months ago, they had to run several times more copies than usual, and still some stores imposed a limit of 2 per customer.
BTW, HarperCollins has announced that it is running more copies of Going Rogue since pre-release sales have been higher than expected, Amazon alone had over 80,000 pre-paid orders. Not bad for a book that hasn’t even come out yet.