FILE - This April 1, 2012 file photo shows country singer Jennifer Nettles, of musical group Sugarland, arriving at the 47th Annual Academy of Country Music Awards in Las Vegas. Sugarland's Jennifer Nettles is releasing a solo album. Nettles says Friday, May 17, 2013 in a news release that she is working with Rick Rubin and will release the album in the fall. (AP Photo/Isaac Brekken, file)