Elizabeth Olsen admits that her unbringing wasn't "average.""It's definitely not a lot of people's average childhood, but I don't know if any of us look back at our childhoods and think of any of them as average," she said of her experience as the younger sister of Mary-Kate and Ashley Olsen."I guess it was unique to me and my sisters' experience," she told United Kingdom host Lorraine Kelly.Mary-Kate and Ashley became known worldwide for starring in "Full House." They quickly began their own..