All eyes have been on Kate Middleton's fashion while she's been touring North America -- and this may be her most memorable look yet!

Prince William and his new bride popped up in Calgary, Canada yesterday wearing 10 gallon cowboy hats, jeans and button-up shirts -- by far their most laid back looks so far.

The two were honored by frontier town with the two white hats when they arrived, a local tradition.

While in the city -- the last stop on their Canadian tour -- the two attended a rodeo, where Prince William started threw a barrel into a chuck wagon.

William & Kate will arrive in California today.

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