Almost 10 years ago on the "Up in Smoke" tour, we saw [artist id="1061"]Dr. Dre[/artist] drinking cognac onstage, and he announced a line of cognac and vodka drinks last year. A few years ago, he did a Coors Light commercial. Now the production legend has moved onto a lighter drink of choice: Dr Pepper.

Dre appears in a new Dr Pepper commercial, in which he takes over things at an outdoor party. The Doc walks in and tells viewers in a voiceover, "Scientific tests prove when you drink Dr Pepper slow, the 23 flavors taste even better. For me, slow always produces a hit." He adds later, "Slower is better — trust me, I'm a doctor."

Dre then makes his way over to the DJ booth, where the guy on the wheels of steel is playing a techno beat that the Compton native doesn't seem to be feeling. Dre politely tells the DJ to "step aside" from the turntables and throws on one of his beats, a track that was made during the Detox recording sessions with co-producers the Buchanans, a rep for the Buchanans told MTV News.

The track used in the commercial leaked onto the Internet in February and was labeled "Topless." A source told MTV news that the song is officially titled "Sh-- Popped Off." The song features [artist id="1225081"]T.I.[/artist] referencing Dre's raps: "It's the D.R. ... Made the West side worldwide, no PR/ Gangsta-rap God, I'm the end-all, be-all/ California love from the Bloods to the C-Dogs."

In March, when asked by MTV News about the song, Tip [article id="1606774"]declined to confirm his work with Dre.[/article]

"I heard about that," Tip said coyly about the track, which is expected to appear on Detox. "Did I really reference vocals for Dr. Dre? Did Dr. Dre confirm I referenced vocals for Dr. Dre? I cannot confirm or deny my involvement with the Detox project, but if I had the chance to work with the great Dr. Dre, it would be an honor and a privilege, and definitely be a pivotal moment and highlight of my career."

Meanwhile, Dre continues to work on Detox. [article id="1612353"]50 Cent and Eminem appeared on BET's "106 and Park"[/article] this week and said Dre has completed 10 songs for the project.