The band, which has won nine Grammys and released 10 legendary studio albums, was forced to cancel shows back then after the singer and lead guitarist James Hetfield returned to rehab as he relapsed after 15 years of sobriety. At the time, a statement from Metallica said: “As most of you probably know, our brother James has been struggling with addiction on and off for many years. He has now, unfortunately, had to re-enter a treatment program to work on his recovery again.” Before 2019, the star was last admitted to a rehabilitation facility back in 2004 following a few years of heavy substance abuse.