Genre-specific music festivals are certainly less common these days. However there are a few standouts, especially for fans of country music, and the ACM Party for a Cause Festival is topping the list for big country events. The 4th annual festival has extended to a three-day event taking place April 1-3, at the Las Vegas Festival Grounds, a 33-acre open-air venue located on the Las Vegas Strip. Headliners for the weekend include two-time ACM Entertainer of the Year Carrie Underwood, two-time ACM award winner Dierks Bentley and four-time ACM Entertainer of the Year Kenny Chesney.

(Photo: Christopher Polk/Getty Images for iHeartMedia)

Three day passes are currently on-sale through the ACM Party for a Cause Festival site but single-day passes are currently unavailable there. For those who can't make a full weekend out of it, all is not lost. For a limited time, fans can grab single-day passes through Groupon, where they are running $75 for any one of the three days. Friday's performance will be headlined by Carrie Underwood, Saturday's performance will be headlined by Dierks Bentley and Kenny Chesney will close out the festival on Sunday night.

Friday night will also feature acts like Kelsea Ballerini, Cam, Martina McBride, Kellie Pickler, Maddie & Tae, Lauren Alaina, Kelleigh Bannen, Brandy Clark, Jana Kramer. Saturday's stage will host Frankie Ballard, Lee Brice, Chris Janson, Dustin Lynch, Chris Stapleton, Chris Young, Chase Bryant, Chris Lane, Jackson Michelson and A Thousand Horses. Aside from Kenny Chesney, country superstars like Brett Eldredge, Sam Hunt, Kip Moore, Chase Rice, Old Dominion, Lindsay Ell, Maren Morris and Granger Smith will also appear on the Sunday stage.

ACM Party for a Cause has grown quickly over its short lifespan. In addition to expanding to a three-day event, the festival has had huge country music acts on top of the bill, most notably Luke Bryan in 2015, Keith Urban in 2014 and Florida Georgia Line in 2013.