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.

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  • 777 Tour

    Rihanna socks and a copy of her album.

  • 777 Tour

    A diamond bracelet.

  • 777 Tour

    Steps to Rihanna's plane

  • 777 Tour

    Kia prepares for departure

  • 777 Tour

    Rihanna socks ... again

  • 777 Tour

    Mexico City

  • 777 Tour

    Rihanna's plane

  • 777 Tour

    Press pass

  • 777 Tour

    Cognac or Ace?!

  • 777 Tour

  • 777 Tour

    A young Mexican fan dances to Rihanna's opener, Congorock.

  • 777 Tour

    Showtime in Mexico: Lasers.

  • 777 Tour

    Kia and Idolator's Managing Editor Bobby Daws feeling a bit of fatigue after the overnight flight to Toronto.

  • 777 Tour

    We're not in Mexico City anymore.

  • 777 Tour

    Spotted: A swag bag.

  • 777 Tour

    Rihanna grabs her own luggage.

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