If you hold onto optimism, don't let go

Singer-songwriter Shania Twain talks with Mika Brzezinski about her life and career at the 30/50 Summit in Abu Dhabi. Twain: Hold onto optimism and don't let go. She says: "Hold on to optimism. Don't be afraid of the future"

She recorded the bestselling album ever made by a woman, but later disappeared from the limelight. She talks about the violent childhood and devastating divorce that make her pop’s great survivor