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Why Is Kate So Thin? Palace Sources Weigh In

Fact: Kate Middleton can wear a cowboy hat and skinny J Brand jeans just as well as she did her epic Alexander McQueen wedding gown.
/ Source: E!online

Fact: Kate Middleton can wear a cowboy hat and skinny J Brand jeans just as well as she did her epic Alexander McQueen wedding gown.

It seems anything that skinny b-tch puts on looks good on her svelte frame.

And it's getting svelter.

As Kate got all outdoorsy in Canada and glam in Los Angeles, we couldn't help but notice the incredible shrinking woman. Who didn't need to lose any pounds in the first place!

So what's behind the Duchess' super-slim figure--and should we be concerned?

READ: Prince William and Kate Middleton Spend Final Day in L.A. With Reese Witherspoon

"I don't think we have a problem like Di did with weight," explains our Brit royals insider. "I don't think William would put up with it, he's very attuned to things with Kate, unlike Charles was with Diana."

We're happy Prince William is breaking the cycle and all, but can the dude give his wife a milkshake or something? We were afraid of her blowing over in those Canadian winds!

But don't fret, perhaps Kate's weight (or lack thereof) is only temporary.

"I think she's naturally thin, but, yes, she was rakishly thin for her wedding," explains our royals source. "But, I would attribute that to any girl who wants to get thin for her wedding and then she's now carried that over to her first official tour."

Ah yes, the Royal North American Tour, dears. It would put stress on anyone! Rushing around from boat races to street hockey games to Skid Row and the BAFTA event--there is simply no time to eat!

"She was absolutely determined the tour be a success," adds our palace pal.

And you know there would have been even more critiques had the Duchess put on the pounds instead of taken them off.

Either way, Kate looks great--we just hope the stress of a whirlwind tour isn't getting to be too much for the gal.

Next time, doll, take a page out of Bill Clinton's handbook and greet the public at a local McDonald's with a large order of fries!

Now that is a photo op--or SNL skit--we would like to see!

PHOTOS: Wills &Kate Take Canada!