1. Tom Morello: Guitarist and former member of the band Rage Against the Machine, Tom Morello, is a big fan of Metallica. He has openly expressed his admiration for the band's music and has even praised Metallica's influence on him as a musician.
2. Lady Gaga: The iconic pop singer Lady Gaga is also a Metallica enthusiast. She has openly spoken about her love for the band and has even been seen wearing Metallica merchandise on several occasions.
3. Will Ferrell: The famous comedian and actor Will Ferrell is known to be a devoted Metallica fan. He has been spotted at several Metallica concerts and has mentioned his admiration for the band in interviews.
4. Jack Black: The actor, comedian, and musician Jack Black is another celebrity fan of Metallica. He is often vocal about his love for the band and has been involved in several Metallica-themed projects, including the music video for the song "Nothing Else Matters."
5. Lars Ulrich: The legendary drummer for Metallica himself is a celebrity who happens to be a fan of other bands and artists. He has expressed admiration for the music of various genres, including classical music, punk rock, and even certain pop and hip-hop acts.
6. Robert Trujillo: Metallica's bassist Robert Trujillo is also a music enthusiast who admires numerous artists, both inside and outside the metal scene. He has cited influences ranging from jazz to funk and has collaborated with various musicians.