Friday saw a wet start to this year's Lollapalooza in Chicago's Grant Park – but the massive gathering of music fans picked up the next day full throttle.

The festival, which celebrated its 26th year this past weekend, served a superb crop of headliners, including hometown hero Chance The Rapper (who gave a politically charged performance), Lorde, Arcade Fire, The Killers, Muse, DJ Snake, Blink 182, Justice, alt-J, The xx, and dozens more.

Through it all, good vibes reigned. Malia Obama was spotted grooving hard to The Killers' set, and Run The Jewels surprised absolutely everyone by letting a superfan come onstage and rap to "Legend Has It." Arcade Fire closed the festival weekend on a hopeful note when singer Win Butler declared that he still believes in America despite all the doom and gloom in the news, before launching into a glorious cover of John Lennon's "Mind Games" to end their set.

Enjoy photos from this year's cloudy but awesome weekend below!

Photo by: Charles Reagan Hackleman for Lollapalooza

Photo by: Charles Reagan Hackleman for Lollapalooza

Photo by: Charles Reagan Hackleman for Lollapalooza

Photo by: Charles Reagan Hackleman for Lollapalooza

Photo by: Charles Reagan Hackleman for Lollapalooza

Photo by: Charles Reagan Hackleman for Lollapalooza

Photo by: Charles Reagan Hackleman for Lollapalooza