Justin Bieber Has Run-In With Undercover Cop?

Well, something like that...

Yesterday (June. 23) Justin Bieber had an unexpected run-in with an undercover cop

in New York City, when his security mistook the plain clothes officer for a crazed fan. In reality, the cop stepped in to push away the swarms of people that were buzzing around JB as he entered a Macy's to promote his new cologine, Someday.

Luckily, Justin wasn't hurt in the mêlée and continued on to his scheduled instore.

Biebs even made it to Letterman late last night.