Post Malone, Grand Ole Opry, more support ACM Lifting Lives work with Williams syndrome

These days, Post Malone's getting help from literally everyone in Music City.

However, few things showcase the depth and scope of the heart of Nashville's music community than the double-diamond singles-selling pop superstar walking into a night of karaoke at Music Row's Losers Bar and Grill with Ernest and Caylee Hammack and being greeted by adult campers from the Academy of Country Music's 15th annual ACM Lifting Lives Music Camp with Vanderbilt Kennedy Center.