sentences:  It marked the first time Spears was on stage since her knee injury caused The Onyx Hotel Tour to be canceled in June 2004.The concert opened with Spears taking the stage accompanied by four blonde female dancers to perform a short version of "...Baby One More Time", wearing a silver beaded bra, a pleated white skirt and white boots.She wore a long brown (blond in later dates) wig to cover the head she had shaved two and a half months previously and appeared in physically good shape.