On which group is this artist, who signed and numbered the lithograph for the pre-ordered album "By the People, for the People," currently a vocalist?
By the People, for the People: By the People, for the People is a compilation album by American heavy metal band Mudvayne. Chad Gray: Chad Gray (born October 16, 1971), is the lead vocalist for the groove metal supergroup Hellyeah and former lead vocalist for American heavy metal band Mudvayne.
i don't know