Beyonce is back! The superstar kicked off the first of her three-day concert "Beyonce Back to Business" at the Revel Resort in Atlantic City, New Jersey on Friday, offering a performance which shows she ready to rock the stage again since her daughter Blue Ivy Carter's birth in January. 　　Her last performance was at the 2011 MTV Video Music Awards last August, when she announced happily on the stage that she was pregnant.It is reported that Beyonce told the 5,500 fans packed into the concert hall that "It feels so good to be back home on stage." 　　And Beyonce's 9-month break seemed did not affect her popularity as she was named the world's most beautiful woman of 2012 in April by People magazine. And not surprisingly, all concerts were sold-out in advance and within hours after going on sale. In addition, A-list guests like U.S. First Lady Michelle Obama and daughters Sasha and Malia Obama were also there to enjoy the night. 　　The former Destiny's Child singer married rapper Jay-Z in 2008 in a secret ceremony and Blue Ivy Carter is the couple's first child.