Barrymore — who shares two daughters, Olive, 11, and Frankie, 10, with her ex-husband Will Kopelman — noted that having a daughter the same age she was when she first started drugs has shifted her perspective on her youth. "Having a 10-year-old daughter now, I just, it's unfathomable. But that's just how I grew up," the ET star confessed.

The stars, who got vulnerable about their harrowing early experiences, wrestle with the question of who to blame in Lovato's new documentary, "Child Star."

Take Demi Lovato who rose to fame on the Disney channel when she was 15 years old. The Camp Rock star has been candid about difficulties she's fac

Demi Lovato highlighted the dangers of child stardom while interviewing Drew Barrymore, Christina Ricci, Raven-Symone, Kenan Thompson and more

In the new documentary 'Child Star', Demi Lovato spoke to Drew Barrymore about their difficult childhoods and the fact they were exposed to drugs since a young age

Demi Lovato and Drew Barrymore have recently shared their disturbing experiences with drugs and alcohol.“It's hard to say that you don't blame other people when other people may have