Beyonce reveals her life's greatest challenge.
"Probably the biggest challenge in my life is time - making sure I have time to be a wife, to be a singer, to be a songwriter, to be an actor and still have time for my clothing line and now for my perfume. I am like any other woman who has a child, who has a husband, who has a job. I think it's the hardest thing about being a woman because we have so many responsibilities."
