Jason Curtis Newsted is an American musician who was the bassist of American heavy metal band Metallica from 1986 to 2001. Beginning his career with thrash metal band Flotsam and Jetsam from 1981 to 1986, he successfully auditioned with Metallica to succeed the deceased Cliff Burton. Newsted performed on the albums ...And Justice for All (1988), Metallica (1991), Load (1996), and Reload (1997), the most album appearances among Metallica's bassists.
James Alan Hetfield is an American musician and songwriter, best known as the co-founder, lead vocalist, rhythm guitarist and primary songwriter for heavy metal band Metallica. He is mainly known for his intricate rhythm playing, but occasionally performs lead guitar duties and solos, both live and in the studio. Hetfield co-founded Metallica in October 1981 after answering an advertisement by drummer Lars Ulrich in the Los Angeles newspaper The Recycler. Metallica has won nine Grammy Awards and released ten studio albums, three live albums, four extended plays and 24 singles.