Some of the biggest country stars in the world are coming together for the 2015 ACM Party for a Cause.  The event will be taped for the “ACM Presents: Superstar Duets” television special that’ll air on May 15th on CBS.  Collaborations include Alabama and the Eli Young Band, Luke Bryan and Ronnie Milsap, Keith Urban and John Anderson, The Band Perry and Deana Carter, and more.  It’ll be filmed on the main stage inside Globe Life Park in Arlington, Texas on April 17th and 18th.