This style mixes elements of folk music with often wryly humorous lyrics, echoes of the poetry of lonesome cowboys. Universally sung to guitar accompaniment, modern country tends to be about the simple things of life such as love, work, and families. Drinking, cars and trucks also figure heavily in country lyrics. Popular artists include Garth Brooks, Johnny Cash, and Dolly Parton. Subgenres and related styles include rockabilly, bluegrass, and country-rock.