Entertainment Rock’s ‘Big 4’ By Post Staff Report Published Sep. 11, 2011, 4:00 a.m. ET 1 of 4 Anthrax Getty Images 2 of 4 Megadeth WireImage 3 of 4 Metallica Kevin Mazur/WireImage.com 4 of 4 Slayer WireImage Up Next Charlotte Ronson Spring 2012 show