Melissa Etheridge, James Brown and Jamie Foxx have been added to an already crowded performance slate for Sunday's (Feb. 13) 47th annual Grammy Awards.

Melissa Etheridge, James Brown and Jamie Foxx have been added to an already crowded performance slate for Sunday's (Feb. 13) 47th annual Grammy Awards.

Making her first public appearance since being diagnosed with breast cancer six months ago, Etheridge will join Joss Stone in a tribute to Janis Joplin, who is among the Grammys' 2005 Lifetime Achievement Award recipients. Both performers are nominated for awards this year.

Brown leads a list of newly confirmed collaborations, with plans to join previously announced performer Usher, while Oscar-nominated actor/singer Foxx will appear with Alicia Keys. John Mayer will also turn out a performance during the CBS broadcast, which will be hosted by Queen Latifah.

Al Green will join the all-star performance of the Beatles' "Across the Universe" that will be sold as a download to raise funds for ongoing tsunami relief efforts.

A new batch of celebrity presenters has also been confirmed, with actor/musician Kevin Bacon set to be on hand, along with producer/artist T Bone Burnett, musician Sheryl Crow and boyfriend/cycling star Lance Armstrong, Anthony Hamilton, Evanescence frontwoman Amy Lee, Ricky Martin, Mario, Nelly and matchbox twenty frontman Rob Thomas.