By Angus MacSwan LONDON (Reuters) – African diva Angelique Kidjo was named Best Artist in Songlines magazine's annual world music awards on Friday, lauded for her high-energy shows and her championing of social causes. French veterans Lo'jo, who mix French folk with African and Arabic sounds, picked up the Best Group award and the young Zimbabwean band Mokoomba was chosen as top Newcomer. The Best Cross Cultural-Collaboration went to Dub Colossus for the blend of Ethiopian roots, reggae and dub beats on their latest album "Dub Me Tender Vol. 1+2". …