Nick Cannon Challenges Eminem To A Fight

'America's Got Talent' host reignites longtime beef with Slim Shady by suggesting they box for charity.

What do you call it when someone, for no apparent reason, revives a beef that you thought was squashed? A re-beef?

Whatever you call it, Nick Cannon just did it. The "America's Got Talent" host and radio DJ attempted to light a fire under his long-simmering (but seemingly over) dispute with Eminem over the weekend by posting a fight-club challenge to Detroit's finest.

"The time has come! Boys talk the talk, but men walk the walk. Nick has laid down the challenge to meet Eminem in the ring," reads a post on Cannon's

target="_blank">official site. "Nick and the rest of the crew on Rollin' With Nick Cannon think it's time for the feud to be over once and for all. And to draw Slim Shady out of hiding, Nick has decided to do it all for charity." Cannon has even set up a

href="" target="_blank">Facebook page to hype the unlikely event.

You remember this year-and-a-half-old beef, right? Eminem's "Bagpipes From Baghdad," off his Relapse album, took some shots at Cannon and his wife, Mariah Carey. Cannon shot back: He dissed Em's skills and clowned on his boasts of bedding Mariah, calling the attack "racist bigotry."

Then Mariah got in on the act, seemingly dressing up as Slim Shady in her "Obsessed" video, even though Cannon said the resemblance was just coincidental. And then it was back on, with Marshall Mathers serving up yet another dis track against Carey and Cannon called "The Warning" in July 2009.

Despite both sides repeatedly denying any beef, the shots continued into August, with Cannon hitting back at Eminem with a series of biblical tweets. And then the whole things seemingly went away.

Cannon reignited the fuse in July, when he reportedly attempted to confront Shady at the BET Awards, making fun of Em for allegedly hiding out behind his security detail. Then, earlier this month, Cannon threw another haymaker, dropping "I'ma Slick Rick," in which he called into question, um, Eminem's ability to get ready for game time. "I don't know if I should hit him because he's feminine Slick/ Excuse me Eminem why you lying on your d---?/ Erectile dysfunction, you wanna get 'em up/ I see your mouth moving but you soft, Teddy Ruxpin," Cannon rapped.

A clean and sober Eminem told Vibe in August that he was done with all that, saying, "I really don't want to talk about [Carey] anymore. I don't want to keep beating a dead horse ... I'm not even going to comment about it. I'm done with that whole situation. I said what I had to say."

A spokesperson for Eminem could not be reached for comment on the Cannon fight challenge at press time.

Would you like to see Eminem and Nick Cannon in a boxing match for charity?