'She's 22 and I'm 122': Arsenio Hall and Kelsea Ballerini Dish on Hosting ABC's All-Star Variety Show 'Greatest Hits'
!['She's 22 and I'm 122': Arsenio Hall and Kelsea Ballerini Dish on Hosting ABC's All-Star Variety Show 'Greatest Hits'](http://www.billboard.com/files/styles/promo_225/public/media/KELSEA-BALLERINI-ARSENIO-HALL-bb17-2016-billboard-1548.jpg)
"His roots and hers are quite different, but music is this common language,” says Ken Ehrlich, executive producer of upcoming ABC summer...