Justin Bieber's X Factor Performance - Video Link and Photos

Justin Bieber recently appeared on X Factor where he gave a live performance. A lot of people criticized the star for lip syncing instead of singing live, but I don't think these people realized how difficult it is for singers. Justin Bieber is currently on a World Concert Tour where he has to sing for hours. The vocal cords can only take so much. A star cannot always sing live on demand, even if