Daredevils, Stunt Queens & More: Meet Hollywood's 10 Toughest Women

Katy Perry goes bungee jumping! Kendra Wilkinson shows off her right hook! Meet the fearless females who kick butt

MICHELLE OBAMA

The First Lady put those famous triceps to good use, showing off her push-up skills with a famous workout partner – Archbishop Desmond Tutu! – while raising awareness for HIV prevention in Cape Town, South Africa.