'American Idol' Brittany Kerr — Hot and Dangerous

Brittany Kerr as a child doing taekwondo
“American Idol” cheerleader babe Brittany Kerr is more than a pretty face — she”s a pretty face with a black belt in taekwondo!

Brittany tells she started studying martial arts in Charlotte when she was 8 (above) — and earned her black belt after 4 years of kicking girls” and boys” butts. Brit says, “I definitely made some boys cry while sparring … I had a killer high kick!”

Kerr is now 24 and says she”s laid off the taekwondo, but still does some kick boxing to stay in shape.

Steven and Randy … you”ve been warned.