1. Beyoncé feat. Jay Z, "Drunk in Love"
Of all Beyoncé's flawless accomplishments over the past 12 months – pulling off the ultimate surprise-album stunt; raking in millions on one of the year's hugest stadium tours; coming out as a proud feminist on national TV – this one stands out as the flawless-est: She managed to make marriage sound ridiculously hot. This future-pop fantasy was the sexiest thing on the radio, from the heavy bass throb to the wild thrill in her voice when she sings about juicy nights ("I get filthy when that liquor get into me"), hung-over mornings and, uh, surfboards. So steamy, even her famous husband’s uncomfortable Ike Turner joke couldn’t kill the vibe.