Metallica is one of my all time favorite bands. They are an American heavy metal band from L.A. 
I really like Metallica.  There was a album where Metallica played with a symphony.  It was my favorite.
They have been around since 1981 formed by Lars Ulrich.
That guy is the best!  Who are some of the other band mates?
Their current lineup includes James Hetfield, Lars Ulrich, Robert Trujillo, and Kirk Hammet.