Beyonce: "Run the World (Girls)"

From "Independent Women" to "Single Ladies," girl power has long been Beyoncé's Topic A, and "Run the World (Girls)" is a blistering return to the theme. She forsakes fashionable sounds — no Eurodisco synths! — to belt over Diplo and Switch's ferocious dancehall beat. The message is party-hearty feminism. But with Gaga, Britney, Katy, Rihanna and Taylor all vying to be the queen of pop, you can bet B isn't looking to share the throne.

Listen to "Run the World (Girls)":

Photos: How Beyoncé and Jay-Z Run This Town