Under a Billion Suns is the seventh studio album by Mudhoney, released in the United States in March 2006. It was recorded with three different producers: Phil Ek, Johnny Sangster and Tucker Martine. The album was a further departure from Mudhoney's original grunge sound, and a continuation of the more commercial sound that began with their previous album. Of note is the unusual amount of saxophones and trumpets featured on the album. A few of the songs also feature female backing vocals. The song "Empty Shells" was featured on the "NHL 2K7" video game.