Angelina Jolie, arguably the world’s most beautiful woman, has admitted to having low self-esteem.The critically acclaimed actress, who is romancing Hollywood hottie Brad Pitt, claims that her life isn’t as perfect as it may seem.She reveals to OK! magazine: “I struggle with low self-esteem all the time. I think everyone does. I have so much wrong with me, it's unbelievable.”The 32-year old has four children, Maddox, Zahara, Pax Thien and Shiloh. She is also rumoured to be expecting twins. Why would anyone with a life like hers complain?