He may be barely 16 years old, but up-and-coming pop and R&B star Justin Bieber is already declaring the world his own. Backed by a dedicated tween fanbase rivaling that of the Jonas Brothers, the young Canadian crooner will launch a lengthy headlining tour of North American arenas.

The massive 42-date My World Tour launches with a June 23 performance at the XL Center in Hartford, CT. After more than five months on the road, Bieber will wrap his tour on December 23 at the Philips Arena in Atlanta, GA.