I love the heavy metal band Metallica have you heard their music before?
They are great! Metallica is an American heavy metal band from Los Angeles
I know I'm for LA I went to their concert people go crazy for them.
The band was formed in 1981 by drummer Lars Ulrich and his best friend James Hetfield.
James Hetfield is my favorite his voice is none other out this world did they win any Grammy or awards i can't really remember? 
I think they have one a few.  The band's fast tempos, instrumentals and aggressive musicianship made them one of the founding "big four" bands.
Who was all apart of the big four besides them seems you know more than me about Metallica lol.
I think it is Megadeth, Anthrax and Slayer.
I never heard of Slayer I would say Metallica is still the best.
heavy metal, appealed to a more mainstream audience, achieving substantial commercial success and selling over 16 million copies in the United States to date, making it the best-selling album of the SoundScan era. After experimenting with different genres and directions in subsequent releases, the band returned to its thrash metal roots with the release of its ninth album, "Death Magnetic" (2008), which drew similar praise to that of the band's earlier albums.
In 2000, Metallica led the case against the peer-to
Metallica
Metallica is an American heavy metal band. The band was formed in 1981 in Los Angeles, California, by drummer Lars Ulrich and vocalist/guitarist James Hetfield, and has been based in San Francisco, California for most of its career. The group's fast tempos, instrumentals and aggressive musicianship made them one of the founding "big four" bands of thrash metal, alongside Megadeth, Anthrax and Slayer. Metallica's current lineup comprises founding members Hetfield and Ulrich, longtime lead guitarist Kirk Hammett and bassist Robert Trujillo