06/23/2011 at 07:20 PM EDT
Heartthrob Justin Bieber
received a hard knock Thursday when an unidentified man tackled him at an appearance at Macy's Herald Square in New York City.
Bieber was at the superstore to debut his new perfume
, "Someday," and went outside to greet fans who hadn't made it into the unveiling.
According to witnesses, when the Biebs exited the doors, the man leaped over a metal barrier and knocked him to the ground.
Bieber appeared uninjured but very "shaken up," according to local news reports
In all the confusion, a member of Bieber's security team also tangled with a plainclothes officer. The security guard was removed from the scene and issued a summons for disorderly conduct.
"This was a momentary, well-intentioned misunderstanding that was quickly resolved, and the event went very well," the pop star's rep tells PEOPLE.
Reporting by CARLOS GREER and JOEY BARTOLOMEO