FILE PHOTO: Beyonce holds the awards she won for Best Urban Contemporary Album for "Lemonade" and Best Music Video for "Formation" at the 59th Annual Grammy Awards in Los Angeles, California, U.S. , February 12, 2017. REUTERS/Mike Blake LONDON (Reuters) - U.S. singer Beyoncé has bought the Ivy Park fitness clothing brand launched two years ago with British retail tycoon Philip Green, who has faced allegations of sexual harassment.