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Pippa Middleton's Sizzling Summer Workouts

That famous behind doesn't come easy. From leisurely jogs to full-on triathlons, see how the Duchess of Cambridge's kid sister stays fit

VICTORY LAP

Pippa Middleton proves she can beat the boys, looking remarkably refreshed as she crosses the finish line during the GE Blenheim Triathlon in Woodstock, England, in June.