By Debbie Emery - Breaking Celebrity News Reporter

Even the chilly London winter can't keep Pippa Middleton under wraps for long!

Her Royal Hotness was back at work on Thursday in a stylish seasonal outfit that clung in all the right places to show off her fabulous figure to perfection, and Breaking Celebrity News has photos from her morning walk to the office.

Dressed in skin-tight leggings and knee-high boots, 28-year-old Pippa's famous butt was on display for all to see as she strutted down the street in a tough biker-chick style leather jacket from Whistles and her Tabitha studded stardust purse.

It was a dramatic difference from her outfit earlier this week when she channeled a naughty school girl in a tiny tartan skirt with black tights and suede boots.

The future Queen of England's gorgeous sister has good reason to have a spring in her step after Barbara Walters named her one of the "10 Most Fascinating People Of 2011."

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