His name is Mason and he's a 5th Grader in Wellington, KS (near Wichita.) His mother posted a vidoe of him playing Colder Weather online and submitted it to a radio station in Wichita. They sent it to Zac Brown's managment who invited Mason to the Zac Brown Eat N Greet before the show on 4/20/13. At the Eat N Greet, Mason was asked if he would like to perform Colder Weather that night on stage... Kudo's to Zac Brown for giving this kid a thrill of a lifetime! Love how excited he is at the end of the song!