We've started everyday so far this week with a new Summerfest grounds stage headliner lineup, but here's something different: a new Summerfest grounds stage headliner lineup AND a new headliner switched into the Big Gig schedule. 

Let's start with the performer swap: Rapper T.I. will replace fellow hip-hop icon Ludacris as a Summerfest headliner, taking the U.S. Cellular Connection Stage at 10 p.m. on Friday, July 5.

And speaking of the U.S. Cellular Connection Stage, here are the rest of the Big Gig headliners headed there this summer:

June 26

10 p.m. – Hanson

June 27

4 p.m. – X

9:45 p.m. – LANCO

June 28

10 p.m. – Styx

June 29

10 p.m. – TBA

June 30

4 p.m. – Riley Green

8 p.m. – Jimmie Allen

10 p.m. – Brothers Osborne

July 2

8 p.m. – Trap Manny

10 p.m. – A Boogie Wit Da Hoodie

July 3

4 p.m. – Nora Collins

6 p.m. – Brandy Clark

8 p.m. – Lindsay Ell

10 p.m. – Lauren Alaina

July 4

9:45 p.m. – Chris Janson

July 5

4 p.m. – Leonid & Friends

10 p.m. – T.I.

July 6

10 p.m. – Semisonic

July 7

10 p.m. – Dylan Scott

In addition to sponsoring this grounds stage, U.S. Cellular also wants to reward you with the ultimate Summerfest experience with, uh, the Ultimate Summerfest Experience contest, with one winner and a guest scoring two days and two nights booked in Milwaukee, two tickets for the American Family Insurance Amphitheater headliner act of their choice, a backstage tour of the U.S. Cellular Connection Stage, a hospitality passes for the Captain's Deck, a Big Gig merch package, cash for travel expenses and a food-and-beverage gift card for Summerfest. Fans can enter to win by dropping by a U.S. Cellular store or texting SFEST19 to 89635 from April 25 to May 5.

For those who don't win free tickets, admission – from $23 general admission tickets to $15 weekday tickets, from $57 three-day passes to $120 11-day passes – is available at the Summerfest website. 

As for more Big Gig announcements, stay tuned to OnMilwaukee.