In order, Top 5:
1 Metallica (98 million albums)
2 Iron Maiden (83 million)
3 Motley Crue (80 million)
4 Def Leppard (65 million)
5 Black Sabbath (50 million)
AC/DC ,Led Zep ,Deep Purple ,GnR..etc aren't regarded as 'Metal'
Neither. They are a psychobilly band (psychobilly is a sub-genre of punk music). Also, "metal" and "heavy metal" are the same thing.
Metal Church is a band that started in 1980 by 5 people that creates heavy metal music. This means that Metal Church is primarily heavy metal music band.
It is a nu band (heavy metal blending in other elements like hip hop
A Heavy metal band.
Heavy Metal band
some people say they are heavy metal but I say they are screamo
Heavy Metal/Rock Metal
No there not, The my are a heavy metal bad, not a screamo band. Some screamo band are satanic, not metal.
No, they are a hard rock band.
Yes, they're a heavy metal band.
Brazil
Heavy metal band Iron Maiden comes from UK.