Grime is a genre of urban music which first emerged in London in the early 2000s, primarily a development of UK garage and electronic music. Grime is typified by sparse and minimalist 2step breakbeats (generally around 140 beats per minute), an aggressive and fast (often double-speed) style of rapping, futuristic electronic elements, and dark, guttural, growling bass lines. In contrast to its more soulful predecessors in breakbeat music, grime is often, though not always, dark and aggressive, featuring MCs as opposed to singers and jettisoning the R&B influences of earlier UK Garage in favour of brutal beats. Due to its experimental nature and diverse stylistic influences, artists involved in the grime scene initially resisted attempts to classify or pigeonhole the style, resulting in a range of different labels, including sublow, 8bar, nu shape and eskibeat. Grime is sometimes associated with dubstep, a similar but largely instrumental genre which also evolved from the early 2000s UK garage scene.