What did Britney Spears mean when she said she lives her life like a karate kid?

When asked on MTV how she keeps away from her past mistakes she said she lives her life like a karate kid. It was the last line of the documentary... What do you think she meant?|||I%26#039;m pretty sure she meant that she lives fighting her problems every step of the way. She%26#039;s a true fighter and she has to be strong at all times.|||she was making a joke, thats why everyone started laughing after she said that