Britney Spears will return to North America for the second leg of her successful Circus tour.

Britney Spears will return to North America for the second leg of her successful Circus tour.

The 20-city run will kick off August 20, in Hamilton, Ontario, and wrap in Las Vegas, Nevada, September 27.

“I’m so excited to bring The Circus back to North America,” Spears said in a statement posted to her official Web site. “I’ve made some really cool changes to the show that I think my fans are really going to love. I also get to bring the show to some new cities we missed the first time around.”

Spears also announced the the tour will hit Australia in November. This will be her first visit to the continent.

Tickets for the second North American leg of the tour go on sale June 19.

The itinerary for the second North American leg of Britney Spears’ Circus tour follows:

August 20 - Hamilton, ON (Copps Coliseum)
August 21 - Ottawa, ON (Scotiabank Place)
August 24 - New York, NY (Madison Square Garden)
August 25 - New York, NY (Madison Square Garden)
August 29 - Boston, MA (TD Banknorth Garden)
August 30 - Philadelphia, PA (Wachovia Center)
September 1 - Orlando, FL (Amway Arena)
September 2 - Miami, FL (American Airlines Arena)
September 4 - Atlanta, GA (Philips Arena)
September 5 - Greensboro, NC (Coliseum)
September 8 - Detroit, MI (The Palace of Auburn Hills)
September 9 - Chicago, IL (Allstate Center)
September 11 - Des Moines, IA (Wells Fargo Arena)
September 12 - Grand Forks, ND (Alerus Center)
September 15 - Tulsa, OK (BOK Center)
September 16 - Houston, TX (Toyota Center)
September 18 - Dallas, TX (American Airlines Center)
September 19 - Bossier City, LA (CenturyTel Center)
September 21 - El Paso, TX (Don Haskins Center)
September 23 - Los Angeles, CA (Staples Center)
September 26 - Las Vegas, NV (Mandalay Bay)
September 27 - Las Vegas, NV (Mandalay Bay)

NEW YORK - After Britney showed up at Madonna’s tour in Los Angeles last November, the material mom returned the favor showing up at the pop princesses’ sold-out “Circus” tour stop Wednesday night in New York City — but just as a spectator.

According to Us Weekly, Madonna took in Spears' show with her manager Guy Oseary — along with multiple bodyguards — from a VIP suite at the Nassau Coliseum on Long Island.

“She purposely walked up the main stairs in front of everybody so they would all notice her,” an concert source told the mag. “Celebrities definitely don’t need to go up the main stairs to get to their suites.”

Madonna reportedly left just before Spears' encore of “Womanizer,” which caused quite the scene.

As she made her way out of the venue, fans gathered around Madonna screaming. The fan frenzy reportedly made Madonna smirk as she exited.

On Spears' Web site, the “Circus” star’s team thanked Madonna for coming, saying; “Britney was thrilled to have her there!”

The “Circus” tour will continue on Friday in Newark, N.J.