As expected, super-producer Dr. Dre, Eminem and Rihanna teamed up for music's biggest night with performances of 'Love the Way You Lie,' and 'I Need a Doctor,' which is the second official single off Dre's upcoming, highly-anticipated 'Detox' album.'

Rihanna kicked things off in a ballgown (with flames shooting out the back) with Maroon 5's Adam Levine at the piano. Eminem eventually came onstage to rapturous applause and did not shy away from the song's explicit lyrics, with long silenced bleeps showing for it. Em then launched into 'I Need a Doctor,' featuring songwriter Skylar Grey. As expected, Dr. Dre joined Em and Grey onstage to rap up the performance.

Dr. Dre has kept a low profile in recent years, becoming somewhat of a hip-hop phantom, but the producer/rapper shocked a New York and Detroit crowd in September 2010 when he made appearances on stage with Em and Jay at the rappers' Home and Home concerts.

Dre's 'Detox' is rumored to have an April 2011 release date.

Eminem will likely take the stage a few more times this evening to accept a Grammy or two or 10. The rapper is up for 11 awards tonight, including Record of the Year for 'Love the Way You Lie' and Album of the Year for 'Recovery' and has already snagged awards for Best Rap Solo Performance for 'Not Afraid.'