NEW YORK (AP) — Justin Bieber has taken to Instagram to unload frustration over what he says are the "countless lies" being circulated about him.

In a passionate post Thursday, Bieber wrote that he's "tired of all the countless lies in the press right now," denying rumors that he's going to rehab. Bieber railed against those he perceives as against him, writing that "I'm 19 and it must be scary to some people to think that this is just the beginning."

Bieber recently collapsed backstage during a London concert, tousled with paparazzi and canceled a performance in Portugal.