Metallica is American heavy metal group

music in the style of thrash metal and heavy metal. lIn Metallica are six participants :
Clifford Lee Burton 
Lars Ulrich
James Alan Hetfield
Kirk Lee Hammett
Robert Trujillo
Jason Curtis Newsted.
This group includes the "big four of thrash metal.” The most famous songs of this group are “Astronomy”, “The Memory Remains” Well , Metallica is older than Image Dragons and more popular. Also, this is my favorite group.