Pitchfork

Courtney Barnett performs with her band at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Courtney Barnett performs with her band at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Courtney Barnett performs with her band at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Courtney Barnett performs with her band at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Bones Sloane performs with Courtney Barnett Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Bones Sloane performs with Courtney Barnett Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

People sit on the grass during the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

People sit on the grass during the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Matt Flegel performs with his band Viet Cong at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Matt Flegel performs with his band Viet Cong at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Mike Wallace performs with his band Viet Cong at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Mike Wallace performs with his band Viet Cong at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Katie Crutchfield performs with her band Waxahatchee at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Katie Crutchfield performs with her band Waxahatchee at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Killer Mike, left, and EI-P perform with their group Run the Jewels at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Killer Mike, left, and EI-P perform with their group Run the Jewels at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Kathleen Hanna performs with her band the Julie Ruin Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Kathleen Hanna performs with her band the Julie Ruin Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Chicago's Chance the Rapper performs at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Chicago's Chance the Rapper performs at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Audience members watch Chicago's Chance the Rapper perform at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Audience members watch Chicago's Chance the Rapper perform at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Chicago's Chance the Rapper performs at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Chicago's Chance the Rapper performs at the Pitchfork Music Festival in Union Park in Chicago Sunday, July 19, 2015. (Erin Hooley/Chicago Tribune) 

Mud, sweat and hipsters, oh my! It's the Pitchfork Music Festival!