The lineups are set for the Academy of Country Music's Party for a Cause Festival. 

Florida Georgia Line, Justin Moore, Cassadee Pope, and Danielle Bradbery have all been added to the first day of the two-day event.  They're joining headliner Rascal Flatts and previously announced performers Thomas Rhett and The Cadillac Three as the show's Main Stage performers, while Chase Rice, Charlie Worsham, and Will Hoge will get things started on the Party Stage. 

Meanwhile, Tyler Farr, Love And Theft, and Parmalee are among the Main Stage additions for the event's second day, which features a total of ten performers including Jerrod Niemann, Kip Moore, Brett Eldredge and headliner Keith Urban.  Niemann also leads the lineup for the ACM After Hours show on the Party Stage. 

The ACM Party for a Cause Festival supports Outnumber Hunger, the Folds of Honor Foundation, and other military-related organizations.  The charity event will take place at the LINQ in Las Vegas on April 4th and 5th, in conjunction with the 49th annual ACM Awards on April 6th. 

ACM Party for a Cause Festival Lineup 

Friday, April 4, 2014 - "Outnumber Hunger Live!" 

Party Stage 

Will Hoge 
Charlie Worsham 
Chase Rice 

Main Stage 

The Cadillac Three 
Danielle Bradbery 
Cassadee Pope 
Thomas Rhett 
Justin Moore 
Florida Georgia Line 
Rascal Flatts 

Saturday, April 5, 2014 - Presented by ACM Lifting Lives in support of military-related charities 

Party Stage 

Austin Webb 
Leah Turner 
Jon Pardi 
Max Impact 
Joel Crouse 
Dan + Shay 

Main Stage 

Love and Theft 
Tyler Farr 
Brett Eldredge 
Kip Moore 
Lee Brice 
Jerrod Niemann 
Joe Nichols 
Chris Young 
Keith Urban 

Saturday, April 5, 2014 - ACM After Hours with Jerrod Niemann & Friends (Party Stage) 

Jerrod Niemann 
American Young 
Natalie Stovall and The Drive 
The Swon Brothers 
Tyler Farr 

Photo Credit Getty Images