2. Taylor Swift, 'We Are Never Ever Getting Back Together'
It's like a Clash of the Titans: Swift, the world's hottest pop singer or songwriter, meets up with Max Martin, the Swedish maestro who's been the Dr. Evil of global trash-disco for more than a decade. To nobody's surprise, they cook up a perfect three-minute teen tantrum about country girls getting mad at high-strung indie boys, topping the charts faster than you can say, "This is exhausting." It's a stadium-chant breakup song that may have less to do with the actual guy it's about than with the massive raging-cowgirl audience Swift has led to the pinnacle of the music world.