Jay-Z and Coldplay helped the Cosmopolitan Hotel in Las Vegas celebrate its grand opening at the stroke of midnight on New Year’s Day (Sat. Jan 1) with a live concert held inside the hotel’s Marquee nightclub.

During Jay-Z’s set, he invited Chris Martin from Coldplay and musician John Mayer to the stage, as well as rapper Kanye West to perform alongside him. Jay-Z and his wife Beyonce also sang a duet of his “Forever Young” song later in the evening. Some of the celebrity attendees at the event included Alex Rodriguez, Brandy, Taraji P. Henson, Selita Ebanks, Channing Tatum, Christina Milian and more.

Check out 20+ pics from the red carpet and inside the concert, as well as video footage from a few of the performances, below and when you continue reading!

Your thoughts on the pics & the performances?

Ouch! In a recent interview with Details Magazine, actor Channing Tatum, who is featured on the cover of their February 2010 issue, recalled an incident in Scotland where he was doing a film that left his penis “burned and shriveled.” But he says it’s all good now.

Channing Tatum’s penis is gross. It looks like a hot dog that’s been left too long on the grill. The tip is hot-pink, singed, and shriveled. It appears angry. And it’s painful to view. My penis hurts just from looking at it. Movie stars tend to be vain, by nature and profession, but Chan—that’s what everyone calls him—does not mind one bit showing me his sad, withered wiener.

“It was the most painful thing I have ever experienced in my life,” he says, flipping through photos on his iPhone until he lands on a grainy snapshot of a scorched member. His scorched member. “I’m good . . . now,” he says with a grin. “Now my penis is fantastic! One hundred percent recovered. Put me back in the game, Coach.”

Tatum has recently returned from Scotland, where he was filming a Roman battle epic called The Eagle of the Ninth, directed by Kevin Macdonald (The Last King of Scotland). The role is a familiar one: For the fourth time in his brief career, Tatum plays a soldier—this one from Rome’s legendary Ninth Legion. “It’s really a beautiful story of trust and honor and friendship,” he says. He nods thoughtfully, then lets out a laugh. “But I’ll never shoot a movie in Scotland again. Ever.”

Tatum was pretend-soldiering one raw, wet October day in the Scottish Highlands. The action required him to wade in ice-cold water, which, despite a high-tech wetsuit, could be withstood for only a few minutes. “The only way to keep warm was by pouring a mix of boiling water and river water down your suit. We were finally done shooting for the day, and one of the crew guys asks if I want to warm up before I go. I’m like, Nah, I’m good. And then I thought, Why not? Thing is, he’d forgotten to dilute the kettle water. So he poured scalding water down my suit. And I was trying to pull the suit away from my body to somehow get away from the boiling water, and the more I pulled the suit away, the lower the water went. It just went straight down and pretty much burned the skin off the head of my dick.”

Tatum was rushed to the nearest hospital—an hour away. Before long, the ice pack he was applying to the burn lost its chill. “I said to the driver, who was ex-special-forces Marines, ‘You might have to knock me out, because I don’t know if I can take the pain. Just grab something and hit me on the back of my head.’” Morphine finally KO’d the agony, and a team of doctors salved and bandaged his wound. “I had five guys looking at my shriveled, burned penis,” he says proudly.

SOURCE: DETAILS MAGAZINE

PICS VIA: JUST JARED

Co-stars Marlon Wayans, Rachel Nichols and Channing Tatum posed for a group pic on the red carpet at the premiere of their new movie, “G.I. Joe: The Rise of Cobra,” held at Grauman’s Chinese Theater Thursday afternoon (Aug 6) in Los Angeles. Sienna Miller, Ciara and Terry Crews also attended the movie premiere.

The film reportedly opened in the number one spot this weekend raking in over $56 million, despite movie-goers not being able to hear how the movie was via film critics. Paramount, the movie’s distribution company, didn’t allow critics to screen the movie before its release.

PHOTOS: GETTY IMAGES / WIRE IMAGE

“G.I. Joe: The Rise of Cobra” star Channing Tatum (autograph pen in hand) can be seen here outside ABC studios in New York City as he made his way back to his car after making an appearance on “Live with Regis and Kelly” Wednesday (Aug 5). But before hopping into his whip and driving off, the actor took the time to sign autographs and take pictures with his fans.

PHOTOS: WENN

Continuing their promo rounds for their new movie, “G.I. Joe: The Rise of the Cobra,” actor Channing Tatum, actress Sienna Miller and actor/comedian Marlon Wayans paid a visit to Fuse’s No. 1 Countdown on Tuesday (Aug 4). The film hits theaters nationwide this Friday, August 7th!

PHOTOS: GETTY IMAGES

Actress Sienna Miller, comedic actor Marlon Wayans and actor Channing Tatum hit up BET’s 106 & Park Monday (Aug 3) to promote their new movie, “G.I. Joe: The Rise of Cobra,” set to hit theaters this Friday, August 7th. Above is a shot of the three of them posing with 106 & Park’s VJs Rocsi and Terrence J. Check out the rest of the pics below!

PHOTOS: WIRE IMAGE / GETTY IMAGES

Terrence Howard and Channing Tatum both appeared Monday night at the NYC premiere of Rogue Pictures’ Fighting, of which both actors co-star. Continue reading for more pics and to see who else attended the official movie premiere at the Regal Union Square in New York.

Mary J. Blige and her producer husband Kendu Isaacs were coupled up at the premiere.

Actor Brian White and BET personality Alesha Renee hit up the premiere too. Brian has a role in the film.

PHOTOS: WIRE IMAGE