Swizz Beatz has paid an emotional tribute to his “brother” DMX at the Billboard Music Awards.The producer hailed the talent of his close friend, who died last month, when he took to the stage at Los Angeles’ Microsoft Theatre to present the award for Top Rap Song.“This year in hip-hop has been really hard,” Beatz said.“We lost so many amazing souls. We would like to honour their lives, and I would like to honour my brother, DMX, the great.“He made music with raw passion.