Surprise! Less than 24 hours after announcing its closing night headliner – a festival within the festival starring Willie Nelson, Bob Dylan and more – Summerfest dropped a deluge of grounds stage headliners late Tuesday night with the help of "Jimmy Kimmel Live."

Here's the lineup for the Big Gig's big 5-0:

Wednesday, June 28

American Family Insurance Amphitheater: Red Hot Chili Peppers with Deerhoof

Flume
The Moody Blues
Frankie Ballard
Misterwives
Spin Doctors
Black Joe Lewis & The Honeybears
Lee Fields & The Expressions
The Marcus King Band
Shaed

Thursday, June 29

American Family Insurance Amphitheater: Luke Bryan with Brothers Osborne

Steve Aoki
Brian Setzer's Rockabilly Riot!
Toto
Hanson
Peter Wolf
Guster
Allen Stone
The Church
Soul Asylum
Berlin featuring Terri Nunn
Fishbone
Pokey LaFarge
Hippo Campus
Tommy Tutone
Slaughter
The Suburbs
GGOOLLDD
Willy Porter Band
Terry Hanck Band
The Regrettes

Friday, June 30

American Family Insurance Amphitheater: TBA

The Revivalists
Dispatch
Trombone Shorty & Orleans Avenue
Jon Bellion
Joss Stone
House of Pain
JohnnySwim
Jerrod Niemann
Barns Courtney
Parade of Lights
Miles Nielsen and the Rusted Hearts

Saturday, July 1

American Family Insurance Amphitheater: Zac Brown Band

Shinedown
Bleachers
Collective Soul
The Naked & Famous
Blues Traveler
Bebe Rexha
Tonic
John Waite
Hey Violet
Horseshoes & Hand Grenades
Dead Horses
Flint Eastwood
The Last Bandoleros
Muna

Sunday, July 2

American Family Insurance Amphitheater: Pink

Steve Miller Band
Andy Grammer
Ziggy Marley
Peter Frampton
Danny Gokey
Car Seat Headrest
Lauren Alaina
Dylan Scott
The Bright Light Social Hour
Dreamers 
Big Thief

Tuesday, July 4

American Family Insurance Amphitheater: The Chainsmokers with Vice and Captain Cuts

Alessia Cara
Miike Snow
Third Eye Blind
Death From Above 1979
PVRIS
Lost Kings
Elephante
Grandtheft
Shaun Frank
High Valley
Dallask
CVBZ
Justin Caruso
Cade
Lanco
IshDARR
Speaker of the House
Loosid
Jamila Woods
Saba
Klangstof

Wednesday, July 5

American Family Insurance Amphitheater: Tom Petty & The Heartbreakers with Chris Stapleton

Phillip Phillips
NeedtoBreathe
Girl Talk
T-Pain
Kyle
JJ Grey & Mofro
James Arthur
Gnash
Welshly Arms

Thursday, July 6

American Family Insurance Amphitheater: Tom Petty & The Heartbreakers with Chris Stapleton

A Day to Remember
Slightly Stoopid
AWOLNATION
Tegan & Sara
REO Speedwagon
BJ the Chicago Kid
Tucker Beathard
J Boog
William Michael Morgan
Irontom

Friday, July 7

American Family Insurance Amphitheater: Dierks Bentley with Cole Swindell and Jon Pardi

Atmosphere
Walk The Moon
Huey Lewis & The News
Dan + Shay
Ben Rector
Aesop Rock with Rob Sonic
Michelle Branch
Phil Vassar
Brother Ali
Grieves
Los Lonely Boys
Vinyl Theatre

Saturday, July 8

American Family Insurance Amphitheater: Future, Big Sean and Migos

DNCE
The Band Perry
Chevelle
Andrew McMahon in the Wilderness
LoCash
Dennis DeYoung: The Music of STYX
Highly Suspect
San Fermin
Whitney

Sunday, July 9

American Family Insurance Amphitheater: Outlaw Music Festival with Willie Nelson, Bob Dylan, Sheryl Crow, Jason Isbell and The 400 Unit, Nathaniel Rateliff & The Night Sweats, Margo Price and Lukas Nelson & Promise of the Real

The Shins
Brett Eldredge
Walk Off The Earth
Gilberto Santa Rosa
Blackberry Smoke
Lauv
Chicano Batman
Domenic Marte
Mondo Cozmo
Mindi Abair and the Boneshakers

Summerfest still has one more American Family Insurance Amphitheater headliner to announce, as well as probably a few additional grounds stage headliners and the rest of the grounds stage acts, so stay tuned to OnMilwaukee for those updates as they happen. Until then, start planning!