Beyoncé: "If I Were a Boy"
New Beyoncé! That's always good news, and "If I Were a Boy" is my favorite type of Beyoncé, in the vein of "Irreplaceable": spare instrumentation, lots of private drama and emoting, and a video full of very intense and meaningful looks. There's also "Single Ladies" [1], but I'm just a total sucker for ballads, so "If I Were a Boy" hits the spot:
[1] "Single Ladies" really isn't doing it for me, yet: listening to it makes me feel like I'm losing at a video game, over and over and over.