Eminem had a top-secret, closed-door rehearsal at the Gibson Amphitheatre late Saturday night for Sunday’s show, and MTV News’ Sway caught up with the Detroit MC on his way in to the theater to talk about his recent success and what has surprised him lately.

 
“I don’t know if anything’s really surprised me,” he said. “More so, I’m happy about the response the record is getting. I’m glad people have caught on to the concept.”

After his bumpy road with substance abuse, Em has some less harmful ways to get pumped up for a performance.

“Lots of alcohol and lots of prescription medications used to be the ingredients,” he told MTV News. “But now, it’s Diet Coke and Red Bull.”

Em, who is no stranger to movies, having starred in the acclaimed “8 Mile,” said he’s considering a return to the silver screen. “For a while, I guess, I wasn’t ready,” he said. “But I’m ready now. I’m just looking for the right script.”

Eminem will take the stage during Sunday’s show, which kicks off at 9 p.m. ET.

Will the vampires grab more trophies than the slumdog? What was the year’s ultimate onscreen WTF moment? It’s up to you to decide the winners of the 2009 MTV Movie Awards. Vote now, and tune in on May 31 at 9 p.m. ET, when the big show airs live from the Gibson Amphitheatre in Universal City, California.

Relapse — the rapper’s first collection for five years — leaked on the internet on Thursday night, 11 days before its official release.

It is third track My Mom that will get tongues wagging.

The rapper who famously struggled with a dependence on painkillers, raps: “My mom loved Valium and lots of drugs. That’s why I’m like I am because I’m my mom.

“There’s no one quite like my mom. I know I should let bygones be bygone but she’s the reason why I’m high on what I’m high on.”

The lyrics then claim Debbie — who he also blasted on 2002 Top Ten hit Cleaning Out My Closet — would sprinkle Valium on his steak and force feed him another drug before packing him off to school.

Elsewhere on the comeback album Eminem is back in familiar territory, fantasizing about murdering starlets such as Lindsy Lohan and Britney Spears in Same Song And Dance.

On Insane he tackles child abuse, rapping as a young boy &  being molested by his stepfather.

TV drama The Wire’s McNulty, aka Brit actor Dominic West, appears on the album, he plays a doctor discharging the rapper from a rehab facility in the opening spoken-word skit.