Aerosmith is an American rock band formed in Boston in 1970. The group consists of lead vocalist Steven Tyler, bassist Tom Hamilton, drummer Joey Kramer, and guitarists Joe Perry and Brad Whitford. Their style, which is rooted in blues-based hard rock, has also incorporated elements of pop rock,  heavy metal, glam metal, and rhythm and blues, and has inspired many subsequent rock artists.  Aerosmith is sometimes referred to as "the Bad Boys from Boston" and "America's Greatest Rock and Roll Band". The primary songwriting team of Tyler and Perry is sometimes referred to as the "Toxic Twins".