Roots of Mike Dirnt

Def Leppard are an English rock band formed in Sheffield in 1976. Since 1992, the band has consisted of Rick Savage, Joe Elliott, Rick Allen (drums), Phil Collen, and Vivian Campbell. They established themselves as part of the new wave of British heavy metal of the early 1980s.

AC/DC are an Australian rock band formed in Sydney in 1973. Their music has been variously described as hard rock, blues rock and heavy metal, although the band calls it simply "rock and roll". They are cited as a formative influence on the new wave of British heavy metal bands. The band was inducted into the Rock and Roll Hall of Fame in 2003 and have sold over 200 million records worldwide, making them one of the best-selling artists of all time.

Lynyrd Skynyrd is an American rock band formed in Jacksonville, Florida, in 1964. The group originally formed as My Backyard and comprised Ronnie Van Zant (vocals), Gary Rossington (guitar), Allen Collins (guitar), Larry Junstrom (bass), and Bob Burns (drums). The band spent four years touring small venues under various names and with several lineup changes before deciding on "Lynyrd Skynyrd" in 1968. The band released its first album, (Pronounced 'Lĕh-'nérd 'Skin-'nérd), in 1973. By then, they had settled on a lineup that included bassist Leon Wilkeson, keyboardist Billy Powell, and guitarist Ed King. Burns left and was replaced by Artimus Pyle in 1974. King left in 1975 and was replaced by Steve Gaines in 1976. At the height of their fame in the 1970s, the band popularized the Southern rock genre with songs such as "Sweet Home Alabama" and "Free Bird". After releasing five studio albums and one live album, the band's career was abruptly halted on October 20, 1977, when their chartered airplane crashed, killing Van Zant, Steve Gaines, and backup singer Cassie Gaines, and seriously injuring the rest of the band.

Van Halen was an American rock band formed in Pasadena, California, in 1972. Credited with restoring hard rock to the forefront of the music scene, Van Halen was known for their energetic live performances and the virtuosity of their guitarist, Eddie Van Halen.