Hayden Panettiere has been acting since she was in diapers, and now she's telling the journey behind the scenes, including addiction and recovery.

Hayden Panettiere has been acting since she was in diapers, and now she's telling the journey behind the scenes, including addiction and recovery.

Stars like Hayden Panettiere, Britney Spears and Whoopi Goldberg got candid about past trauma.