38. Missy Elliott, "Get Ur Freak On"
"Me and Timbaland been hot since 20 years ago," crows Elliott, a ludicrous boast that seemed almost plausible in the late Nineties and early Aughts, when the pair were music's most reliable brainbenders. "Get Ur Freak On" is Missy and Tim at their funkiest and nuttiest. The production takes hip-hop Orientalism to outer space, marshaling Indian tablas and snatches of Japanese speech. "When it blew like that, I realized there was a whole other part of the world that people were ready for," she said. "It was a good thing."