It's quite easy to map out the talents of successful singers: whether it's Carrie Underwood's endless range, Kacey Musgraves' clever wordplay or Luke Bryan's tight-jeaned dance moves, these are the skills that sell records, win Grammys or make the ladies swoon. But most of us possess a hidden talent, and musicians are no exception. From breakdancing to taekwondo, these are the varied — and at times surprising — abilities that country stars keep in their back pocket (or land on Johnny Cash's front yard).