Mick Jagger isn't sure where his latest musical creation will end up on iTunes. The Rolling Stones rocker has teamed up with Eurythmics co founder Dave Stewart, reggae maestro Damian Marley, soul songtress Joss Stone and "Slumdog Millionaire" composer A.R. Rahman for SuperHeavy, a new group fusing their different styles on an as-yet untitled album set for release Sept. 20 in the United States, and a day before in the rest of the world.

"What bit of iTunes genres does it go on? The unknowable? Isn't there an unknown section?" Jagger joked during a preview event last week at Jim Henson Studios, where the group recorded some of their eclectic music.

Stewart called the collaboration wide-ranging. The recording process began in Hollywood with the entire group, but they also recorded separately. Other recordings took place in Florida, France, Greece, Turkey, India and the Caribbean. Stewart said the group recorded about 35 hours of music with some songs originally lasting "an hour and 10 minutes" before they were whittled down.

One of seven tracks teased Thursday included "Miracle Worker," the first single off the album, which features the vocalists crooning: "Ooh, you're a miracle worker/Ooh, you're the surgeon of love." The group filmed a music video last Wednesday for the mid-tempo track, which like most of the music previewed, combined rock, soul, reggae and world music.

"Working with four other vocalists was interesting to me," said Jagger. "I've never actually done it before. Normally, I have to do everything, which I'm quite happy to do. Don't worry. It was kind of fun because when we had to finish it off, I realized we all had a part to play."

Jagger said the group would wait for reaction to the album before deciding if the supergroup will go on tour. "We'll probably end up playing in the unclassified gig section," Stewart quipped. "Yeah, in a tent at Glastonbury with the unclassifiable acts," Jagger added.

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The Recording Academy is finally getting some satisfaction, with Mick Jagger's first appearance on the Grammy stage.

The Rolling Stones frontman will perform at the Feb. 13 ceremony as part of a tribute to soul great Solomon Burke, who died last year. The Rock and Roll Hall of Famer opened for the Rolling Stones several times during his career comeback late in life.

Jagger will perform with soul singer Raphael Saadiq during the 53rd annual Grammy Awards, which will air live on CBS from the Staples Center in Los Angeles (8 p.m. EST).

"We're thrilled, delighted, excited and very much looking forward to Mick doing his debut on the Grammy stage," said Neil Portnow, president and CEO of the Recording Academy. "It's extraordinary to many of us that the fact is, this will be the first time; he has never performed on the Grammy stage."

This won't be Jagger's first appearance on a Grammy telecast. In 1986, the Rolling Stones were given a lifetime achievement award by Eric Clapton, and they performed on the show by satellite.

"We did a remote from London, and it was at least three o'clock there," said show producer Ken Ehrlich.

"I think they had been celebrating a little time before we went on camera," he said. "It was quite a moment."

Ehrlich has produced the show for 31 years and has always wanted Jagger and the Stones to perform, but it didn't work out until this year.
Ehrlich said it was Jagger's admiration for Burke that brought him to the Grammy stage.

"He's asked me not to go into detail about what he's doing, but I think when you see the performance, it will make a lot sense," said Ehrlich. "I think it was the idea of the performance that was intriguing to him and really brought him here."

Jagger will join a performers list that includes Rihanna, Cee Lo, Gwyneth Paltrow, Eminem, Arcade Fire, Katy Perry, Bruno Mars, Usher, Lady Gaga, Lady Antebellum and Justin Bieber.

When asked who was left on his list of must-have Grammy performers, Ehrlich, noting the numerous legends who have appeared on the Grammy stage, said: "In all honestly, that's about it."

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