Julia Roberts has been named the "World's Most Beautiful Woman" by "People" magazine for the fifth time. "I'm very flattered," she told the magazine. The star first graced the cover in 1991 when she was just 23, a year after the release of "Pretty Woman." In the issue, Roberts, who is mom to 12-year-old twins and a 9-year-old, also talks about her marriage to cinematographer Danny Moder. The issue hits stands Friday and also features gorgeous couples, including Sofia Vergara and Joe Manganiello.