Justin Beiber earns a minimum of $300,000 per show

"Justin Bieber earns a minimum of $300,000 per concert, placing him near the top of the summertime tour earnings list, contract records show.
The 16-year-old performer earns more per gig than established acts like Sheryl Crow ($146,500), Weezer ($150,000), and Bret Michaels ($64,000). Bieber, though, does not command as much as Rascal Flatts ($702,500), Kiss ($500,000), or Keith Urban ($487,500).
A review of dozens of concert contracts shows that Bieber outearns all of his young contemporaries, banking twice as much as Drake ($155,000), three times that of Disney star Selena Gomez ($100,000), and four times as much as “American Idol” winner Jordin Sparks ($75,000).
Source:  The Smoking Gun, 28th September 2010