The owner of the North Hollywood dance studio which has become Britney Spears' second home insists the troubled pop superstar is back to her best, judging by her secret work-outs. Millennium Dance Complex's owner Robert Baker reveals Spears has been spending quite a lot of time working on her dance moves for upcoming live dates. Baker says, "(She's here) pretty much nine to five everyday, which is reminiscent of her old days when she was gearing up for her other tours." And the dance studio boss insists his famous regular is no diva when it comes to dancing - she'll put anyone through their paces. He tells U.S. TV news show Extra, "Britney has a good heart... She will call us and say, `Hey, I would like to teach some kids dance just to give them some encouragement.' "These are various things that she does that no one gets the opportunity to see." Spears staged auditions for dancers at Millennium on Monday (15Oct07).