Bieber Fever rules: millions of fans took minutes to snatch up tickets to see Justin Bieber in concert, creating a sold-out summer tour sensation. Today the platinum- selling pop singing sensation Justin Bieber announced the second leg of dates on his headlining tour of North America. Already hitting 40+ cities in its first leg of dates, the second phase of The "My World" Tour, presented by AEG Live and Xbox 360 will blaze a trail through more than 35 cities, bringing the tour to 75+ cities before wrapping up December 23 in Atlanta.