The New York Post reports that after Nick Carter reunited with Paris Hilton following their announced breakup to attend Amanda Demme’s weekly party at the Argyle Hotel, the Backstreet Boys star later lost his temper and beat Hilton, leaving the ugly marks on her face and arms. Friends say Hilton is “scared to death.” The pal added: “He has major anger-management issues . . . We have seen bruises on her before and asked her about them. She has always denied it – until now.” Carter’s lawyer, Marty Singer, fiercely denied Carter had anything to do with the bruises on Hilton, claiming Hilton is spreading rumors because she’s angry with the singer.