every concert I've been to!!

Katy Perry - October 24, 2017

        (opening acts: Noah Cyrus)

Slayer - May 25, 2018

        (opening acts: Testament, Behemoth, Lamb Of God, Anthrax)

Slayer - November 2 and 3, 2019

        (opening acts: Phil Anselmo and the Illegals, Ministry, Primus)

Slipknot - October 17, 2021

        (opening acts: Code Orange, FEVER 333, Killswitch Engage)

Slipknot - April 1, 2022

        (opening acts: Wage War, In This Moment)

Megadeth - May 4, 2022

        (opening acts: In Flames, Trivium, Lamb Of God)

Band-Maid - May 22, 2023

        (no opening acts)

Metallica - August 4, 2023

        (opening acts: Prong, Mammoth, Pantera)

Metallica - August 6, 2023

        (opening acts: Overkill, Ice Nine Kills, Five Finger Death Punch)

The Offspring - August 18, 2023

        (opening acts: Sum 41, Simple Plan)

BABYMETAL and Dethklok - September 3, 2023

        (opening acts: Jason Richardson)

Pantera - September 14, 2023

        (opening acts: King Parrot, Lamb Of God

In This Moment - November 14, 2023

        (opening acts: New Years Day, Avatar)

Waterparks - March 23, 2024

        (opening acts: Pollyanna, Loveless)

GWAR - March 29, 2024

        (opening acts: Cancer Bats, Fuming Mouth)

Primus, Puscifer, and A Perfect Circle - April 7, 2024

        (no opening acts, they cycled between bands every 3 songs)

Lacuna Coil - May 7, 2024

        (opening acts: Oceans Of Slumber, New Years Day)

Avatar - May 10, 2024

        (opening acts: Oxymorrons, Conquer Divide)

In This Moment - May 11, 2024

        (opening acts: Mike's Dead, I See Stars, Kim Dracula)

Lamb Of God - July 27, 2024

        (opening acts: Malevolence, Kerry King, Mastodon)

Blink-182 - July 29, 2024

        (opening acts: Astronoid, Pierce The Veil)

Primus - August 17, 2024

        (opening acts: Coheed and Cambria, Puddles Pity Party)

Megadeth - September 6, 2024

        (opening acts: All That Remains, Mudvayne)

Rob Zombie - September 11, 2024

        (opening acts: Filter, Ministry, Alice Cooper)

Korn - September 18, 2024

        (opening acts: Spiritbox, Gojira)

Whitechapel and Lorna Shore

        (opening acts: Sanguisugabogg, Kublai Khan TX)

Sepultura - October 4, 2024

        (opening acts: Claustrafobia, Agnostic Front, Obituary)

Hatebreed - October 26, 2024

        (opening acts: Crypta, Harm's Way, Carcass)

BABYMETAL - November 12, 2024

        (opening acts: Scene Queen)

Iron Maiden - November 13, 2024

        (opening acts: The HU)

Primus, Puscifer, and A Perfect Circle - May 10, 2025

        (no opening acts, they cycled between bands every 3 songs)

Metallica - May 31, 2025

        (opening acts: Suicidal Tendencies, Pantera)

BABYMETAL - June 20, 2025

        (opening acts: Bloodywood, Black Veil Brides)

Hatebreed - July 23, 2025

        (opening acts: Gridiron, Fugitive, Snuffed On Sight, Incite)

Nine Inch Nails - September 5, 2025

        (opening acts: Boyz Noize)

B-52s and DEVO - October 24, 2025

        (opening acts: Lene Lovich)

I also went to a 4-day festival in September of 2025, here's all the bands I saw:

Day 1: Fulci, Winds Of Plague, Fear Factory, Municipal Waste, Carcass, Exodus, Cavalera Brothers, Cannibal Corpse, DOWN, Marilyn Manson, Lamb Of God, Rob Zombie, Slayer

Day 2: Nonpoint, Northlane, Dope, Imminence, Static-X, PVRIS, Insane Clown Posse, Mudvayne, Spiritbox, Hatebreed

Day 3: Snot, DevilDriver, Spineshank, Kittie, Chimaira, Stone Temple Pilots, Stabbing Westward, Machine Head, Cypress Hill

Day 4: Dying Wish, Slaughter To Prevail, Testament, Wage War, Knocked Loose, WARGASM, Bruce Dickinson, Evanescence, In This Moment