Friday has Arctic Monkeys, Jimmy Eat World, and more; Saturday has Eminem, The Killers, Lil Wayne, Portugal The Man and more; Sunday has Kendrick Lamar, SZA, alt-J, MGMT, and more.
Arctic Monkeys, Jack White, The National, and Vampire Weekend all play different days, so if you were hoping to catch the big indie/alternative rock names and just go one or two days, that's kind of a bummer. St. Vincent the same day as Vampire Weekend is a nice touch though.
The 2018 Lollapalooza lineup also includes The Weeknd, Bruno Mars, Portugal. The Man, Tyler the Creator, Brockhampton, Lykke Li, Franz Ferdinand, Manchester Orchestra, Parquet Courts, Stars, and more.
The Montreal festival also includes James Blake, Anderson .Paak, Lykke Li, The National, Blondie, Tyler the Creator, Brockhampton, Julien Baker, Jenny Lewis, Blood Orange, and still tons more.