 On December 2, 2008, Britney Spears announced the first leg of twenty-five dates in the US for The Circus Starring Britney Spears with The Pussycat Dolls as the opening act.The tour kicked off on January 18 in Aberdeen, Scotland with the first leg ending in Belgrade, Serbia.Before heading to the Oceania shows, The Pussycat Dolls supported Spears on her tour visiting 27 venues in North America.