Justin Bieber turned out to be the biggest rock star and unifier at Ariana Grande's One Love Manchester concert ... which proved one of the most moving moments of the night as he broke down onstage. Actual Video:- ****** Bieber went on late into the benefit show Sunday with nothing more than a guitar and his voice. That in itself was incredibly effective, as he got almost the entire crowd to sing along to some of his hits. FOLLOW US Facebook:- ****** Google Plus:- :- ******