Justin Bieber attacked on stage by fan

Singer Justin Bieber was attacked by a fan at his show but security
guards intervened and prevented the incident from disrupting the
event.
The incident took place Sunday night when the 19-year-old pop star was
performing one of his last songs, "Believe".
"A man ran on stage during 'Believe' and tried to grab Bieber and
knocked the piano over," a source close to the singer told KRSonline.
"He was a fan. Security detained the young man. All was fine and
Bieber continued the show," he added.