VIDEO : Stephen Colbert Interviews Eminem on a Michigan Public-Access Show

Stephen Colbert is getting ready for his next big gig on The Late Show starting September 8. The funnyman got some practice by hosting Only in Monroe , a public-access television talk show for the small town of Monroe, Michigan. Exactly 22 minutes into the show, Colbert welcomed a special guest: Detroit native Eminem -- or as the host called him, "a local Michigander who is making a name for himself in the competitive world of music, Marshall Mathers." For the next 15 minutes, Colbert quizzes the rapper on his Bob Seger knowledge, the duo talk about Eminem's career, promote Southpaw -- with a video of two cats fighting -- and nearly get into a fight themselves.