Ciara and Kristinia DeBarge just got the call from Brit Brit to be the opening acts on the next leg of her North American tour, which starts Aug. 20.

We love that Britney Spears keeps turning to her sisters for opening acts-as you recall, the Pussycat Dolls opened the last leg.  The only boys allowed are back-up dancers...and her daddy and her agent/boyfriend.

DeBarge, who is riding high on her first hit, "Goodbye,"  says in a statement, "Joining Britney Spears for her 'Circus' tour will be an amazing and surreal experience for me. I have been dreaming of an opportunity like this forever, and can't wait."

Says Ciara about Britney in a quote on Spear's website: "Everything about Britney makes you like her. I feel like she's a star. She's got that energy that's just magnetic. She just glows. It's not just one thing about her that makes her cool."  We'd rave about her too if we'd just gotten the opening slot, although the quote appears to be an earlier comment from Rap-Up magazine, meaning Ciara was sucking up before she had to.

Tour dates are:

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                       AA Arena
September 4               Atlanta, GA                    Philips Arena
September 5               Greensboro, NC            Greensboro Coliseum
September 8               Detroit, MI                      The Palace of Auburn Hills
September 9               Chicago, IL                    Allstate Arena
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 Events Center
September 27             Las Vegas, NV              Mandalay Bay Events Center