Princess Kate Secretly Attended Pippa's Bachelorette Party While William Partied in Switzerland

Prince William isn't the only royal to hit the slopes recently! While the royal dad enjoyed a guys-only ski trip in Switzerland last month, Princess Kate wasn't at home with Prince George and Princess Charlotte as was previously thought -- she was out enjoying her own ski vacation. Kate joined her younger sister Pippa Middleton for her bachelorette party -- or hen party as it's known in the U.K. -- on the slopes of Meribel in the French Alps. Pippa is set to wed financier James Matthews next mon...