Two-time Grammy-winning rapper Eminem will launch a transcontinental tour that kicks off April 24 in Milwaukee.

The tour will see Eminem, 25, debut new material from his

forthcoming album, Marshall Mathers LP (May 23), during the May 1 show at London's high-profile Brixton Academy, said Dennis Dennehy, Eminem's publicist at Interscope Records.

Marshall Mathers LP is the 16-track follow-up to Eminem's

triple-platinum The Slim Shady LP (1999). The new record will

contain tracks produced by Eminem (born Marshall Bruce Mathers III) , F.B.T. Productions, DJ Head, Mark the 45 King and Dr. Dre, who is also the executive producer.

"Mathers is the s---," Dennehy said. "It's harder and maybe a

little more serious than Slim Shady. It's just Eminem. It's gonna make you laugh."

Eminem's official Web site (www.eminem.com) recently posted in its

"News" section that "The Real Slim Shady," the first single from the

new record, will debut April 21 on radio.

"That could be subject to change," Dennehy said. "It's hip-hop.

Anything can happen."

MTV programming however has confirmed that the premiere of the video of "The Real Slim Shady" will be featured in the show "Making of the Video," which airs at 10:30 p.m. on April 24. (Sonicnet.com's parent company, Viacom, also owns MTV.)

Kansas native/Detroit transplant Eminem has sold more than 3 million units of his Web/Aftermath/Interscope record The Slim Shady LP. The album, which is Eminem's scathing answer to Motown hip-hop critics, boasts such gutsy cuts as "My Name Is" and "Guilty Conscience" (

HREF="http://media.addict.com/music/Eminem/Guilty_Conscience.ram">RealAudio excerpt).