'Numb': Rihanna & Eminem Team Up For Hazy Track Off 'Unapologetic' (AUDIO)

Rihanna's "Unapologetic" hits stores Monday, and though her label has only officially released "Diamonds" (and its Kanye West remix), a number of tracks have leaked. First, her "Chris Brown song" "Nobody's Business" made its way online, and now "Numb" has appeared.

The track is a hazy meditation on smoking weed until one gets numb, a message echoed in the song's sound: If you can't listen to it right now, just imagine walking into a fog or smoke-filled nightclub, and you're just about there.

Eminem provides a slightly disjointed verse that doesn't necessarily bode well for those hoping Shady would return to the aggressive style that made him a household name. "I'm the butt police, and I'm looking at your rear (rear, rear)," he says, without any sort of ironic inflection. (Not that no one is impressed, PopCrush deemed his verse "murder rap" and promises "you will feel numb with aural pleasure" after listening.)

We'll let you decide. Peep the track above. More on Rihanna and her 777 Tour is available here. HuffPost Entertainment will publish our dispatch from the tour on Monday morning, complete with insights on Rihanna's career from the likes of Kanye West and a number of her songwriters.

777 Tour