Britney Spears is one of the top-selling artists of the last decade and to date has sold in excess of 62 million albums worldwide. Her latest album, Circus, is her fastest-selling album and has spawned 4 hit singles so far: ‘Womanizer,’ ‘Circus,’ ‘If U Seek Amy,’ and ‘Radar.’ She is currently in the midst of her hugely successful ‘The Circus Starring Britney Spears’ tour which has sold out all of its dates and been extended to include an Australian leg and further North American dates.