There really must be something in the water in Oklahoma. The state has produced more country greats per capita than probably anywhere else on earth – Reba, Blake, Vince, Garth, and Toby all hail from the same state where The Swon Brothers spent their formative years. In fact, Muskogee, OK, natives Zach and Colton Swon grew up right down the street from American Idol champ-turned-country-superstar Carrie Underwood, and the three shared a stage many times throughout their childhood years.