Since its inception back in 2014, Louder Than Life music festival has been one of the largest rock music festivals in the United States. It's an annual fall heavy metal rock festival in Louisville, Kentucky that's been held at the Kentucky Exposition Center as of 2019, and before that, it was hosted at Champions Park. The event originally spanned two days until a third day was added in 2019, and now is a four-day festival that lasts from Thursday through Sunday. Some incredible lineup acts that have rocked out for fans at Louder Than Life over the years include Judas Priest, Kid Rock, Rob Zombie, Guns N' Roses, Slipknot, Incubus, Ozzy Osbourne, and many more.