Two weeks before the Jammys , our artist additions are arriving fast and furious. Umphreys McGees Jake Cinninger and Hubert Sumlin are the latest addition to the April 20 ceremony; they join a stacked lineup with already includes moe., Blues Traveler, Bela Fleck and the Flecktones, Mickey Hart, Billy Kreutzmann, Dweezil Zappa, Mike Gordon, Peter Frampton, Joe Satriani, Stephen Marley, Ky-Mani Marley, Guster, Savion Glover, Richie Havens, Angelique Kidjo, Steve Kimock, Stephen Perkins, Bettye LaVette, Little Feat, DJ Logic, Mad Professor, Baaba Maal, Martin Sexton, Grace Potter, Chick Corea, Charlie Musselwhite and McCoy Tyner. While the exact nature of the evenings artist pairings will remain a mystery until showtime, we feel it is only appropriate to mention that Cinninger is among the artists interviewed in the Frank Zappa tribute appearing in the current issue of Relix.

In addition, a number of artists will appear outside New Yorks Grand Central Station on April 21 and 22 as part of Green Apples EarthFair. Grace Potter and the Nocturnals, Umphreys McGee, Martin Sexton and the Mutaytor with Mickey Hart and Baaba Maal will offer free performances Friday, while Constant Wonder, Jonah Smith, Assembly of Dust, Ben Taylor and Dresden Dolls will be on hand Saturday.