Pop star Justin Bieber played acoustic show for those losing their loved ones in the 9/11 attacks.
During the occasion, the people gathered around Bieber as he played acoustic version of his songs like "What Do You Mean" and "All That Matters" with guitarist Dan Kanter backing him, reported Ace Showbiz.
Earlier the day, Bieber, 21, played some of his biggest hits including older songs like "Boyfriend" and "Baby" while taking the main stage of "Today" show.
At one point during his mini-concert, the 21-year-old superstar was caught complaining about the cameras not capturing his dance routine.
"Next time I won't dance because the camera's here the whole time. I might as well not dance," he ranted in front of one of the cameras, apparently without realizing his mic was still on.
