3. Little Big Town, "Girl Crush"
For their second single off Pain Killer, Little Big Town introduced one of the boldest songs not only of their career, but of recent country music memory. In a haunting exploration of jealousy, the song's narrator refrains from resenting the woman who has stolen her man, instead developing a burning "girl crush" on her. "I want to taste her lips/'cause they taste like you," Karen Fairchild sings in a minimalist, soulful arrangement that finds the group doubling down on its signature four-part harmonies. They're some of the more shocking — and refreshing — Music Row lyrics in years.