Then: You surely remember Madonna from 'Dick Tracy,' in which she played sultry nightclub singer Breathless Mahoney. Warren Beatty's real-life girlfriend at the time, Madonna agreed to perform the role for scale to assuage accusations of favoritism. The pop star followed up 'Dick Tracy' with roles in 'A League of Their Own' and 'Evita.'

Now: Madonna doesn't act as much as she used to, but she is still a chart-topping singer. The 54-year-old provocateur spent much of 2012 on a world tour.