Mack, Jack & McConaughey is a two-day charity event filled with music, golf, fashion and fun. The annual Jack & Friends concert this year will feature the talents of Willis Alan Ramsey, Jon Randall, Jessi Alexander, Keith Gattis, Will Hoge, Bobby Pinson, Allen Shamblin, Bruce Robison, Holly Williams, Christopher Coleman and Butch Walker, with a special appearance from late night host (and Austin fave) Jimmy Kimmel.