Pop superstar Britney Spears added more dates to her North American 2009 tour. The trek kicks off March 3 by concert in New Orleans Arena. Updated tour schedule, which now lists 36 dates, is included below, tickets are available to book online. Singer will visit Atlanta (GA) Miami (FL), Boston (MA),Toronto (Ontario), Dallas (TX), Los Angeles (CA), Las Vegas (NV), and many other markets. Britney is touring in support of her new album “Circus”, released in December.