Heads Up, Smithfield! ‘Hey Whiskey’ Duo Try to Hum Country Songs [Watch]Heads Up, Smithfield! ‘Hey Whiskey’ Duo Try to Hum Country Songs [Watch]Sure, Smithfield know their own songs. The "Hey Whiskey" duo sing them all the time, and could literally hum them in their sleep. But how about other people's songs?Billy DukesBilly Dukes