Right now, Taylor Swift has jumped to close if not at the top of my list. Why? Because she keeps getting idolized as this "classy", "demure", "perfect" example of a "young lady", yet every time you turn around she's dumping some new poor bastard. Then surprise! A new "breakup song" is number one on the charts. She basically uses guys to have fodder for her next song. And that's ALL she sings about: how she "always" gets burned by guys and how guys are "always" two-faced jerks. Real great example for young ladies everywhere...
Ms. Swift, you are 23 years old, it's time to grow up and stop acting like a highschool brat.