Dressed as a glamorous ringmaster and directing a colorful cast that included jugglers, acrobats and martial arts dancers, Britney Spears delivered a tightly choreographed, if perfunctory performance Tuesday night as she kicked off her first concert tour in five years. The 27-year-old pop superstar's “Circus” tour kicked off in her home state of Louisiana at the New Orleans Arena before a nearly sold-out crowd that cheered on their idol as she gyrated and slithered across the stage while singing some of her biggest hits, from the recent “Womanizer” to her first and now classic song, “Baby One More Time.” The wild applause has been largely absent from Spears' life since the last time she went on tour in 2004, as the singer endured a devastating downward spiral: Due largely to personal troubles, she went from one of pop music's most profitable, in-demand entertainers to an out-of-control tabloid persona who seemed to be on a path to destruction. But over the last year, that path has been reversed, as she has embarked on a successful comeback that has seen her image, as well as her career, rehabilitated. Acrobats twirled from suspended fabric as Spears sang and danced, showing off her toned body with flirty, seductive moves. She got frisky with two male dancers as she performed “Touch of My Hand” while sporting a blindfold. When Spears slowed down the show for “Everytime,” the audience could be heard singing the lyrics - “everytime I try to fly I fall, without my wings I feel so small” - along with her.