LONDON (Reuters) – Pop star Justin Bieber wrapped up his final London show without hitches on Friday after a week riddled with paparazzi run-ins and a trip to the hospital. Bieber, 19, sang and danced his way through his fourth night at London's O2 Arena on the European leg of his "Believe" world tour, back to his normal self after collapsing on stage from shortness of breath on Thursday. The Canadian-born singer was treated by doctors backstage and given oxygen on the third night of his London shows. …
