Sacrament is the Grammy Award nominated fifth studio album from the American metal band Lamb of God. Released on August 22, 2006, Sacrament debuted at #8 on the Billboard 200 charts with first-week sales of 63,000. The album was the top-selling metal album of 2006 and received the Album of the Year award from Revolver magazine. Sacrament was nominated in the 2007 Grammy awards for best Metal performance, for the track "Redneck", which can be seen here, eventually losing out to Slayer.[2] As of 2010, it has sold over 330,000 copies in the United States.

Systematic Chaos is the ninth studio album by American progressive metal band Dream Theater. Released on June 4, 2007 in the United Kingdom and June 5, 2007 in the United States, Systematic Chaos was the band's first release through Roadrunner Records. The album was recorded from September 2006 to February 2007 at Avatar Studios in New York City, after the band's first break from summer touring in ten years. The lyrics of the album were written by John Petrucci, James LaBrie, and Mike Portnoy about fictional, political, and personal topics, respectively.