Madonna

One of the few megastars only needing a single name, Madonna's brand of dance pop began as the purest of bubblegum but has become increasingly sophisticated during the course of a career now in its third decade. Her influence has lessened a bit since the multimedia dynasty she lorded over in the 1980s and early '90s, partly because she's been busy raising children and partly because the focus of dance-oriented music has radically shifted in the years between Bedtime Stories (1994) and Confessions On A Dance Floor (2005). However her clubbing antennae remain finely tuned, and each subsequent release serves less as an indication of her musical development and more her ability to latch onto producer/writers of the moment. This, and her constant image-massaging to remain relevant to the dance community, allows a mother in her early forties to get away with acting like a club kitten without too much dissent, even less so with her triumphant 2005 return to form. A ruthless careerist and tougher than most of us, she does tend to show weakness with her lyrics, which at their best are simple ditties and at their worst just plain embarrassing. A catchy tune is usually there to save the day, however, and perhaps this is why she has failed to make it in the acting world -- she needs the music to shield her inability to deliver a really good line. And what music -- hit after hit, some still working a dancefloor just as effectively 20 years after initial release. Few other artists in the dance pop and electronica world show such staying power, and few receive such goodwill from their fan base, no matter which upheavals she drags them through as she hops and skips from fad to fad, laughing all the way to the bank.