U.S. singer Marc Anthony and girlfriend Chloe Green have ended their yearlong romance, UsMagazine.com reported Monday. "They are taking a break," an insider told the magazine. "It is because of busy schedules." Anthony, 45, is divorced from singer-actress Jennifer Lopez, the mother of his 5-year-old twins. Green, 22, is the British heiress to the Topshop fortune, UsMagazine.com said.