House music is a genre of electronic dance music that originated in Chicago in the early 1980s. It was initially popularized in Chicago, circa 1984. House music quickly spread to other American cities such as Detroit, New York City, and Newark – all of which developed their own regional scenes. In the mid-to-late 1980s, house music became popular in Europe as well as major cities in South America, and Australia. Early house music commercial success in Europe saw songs such as "Pump Up The Volume" by MARRS (1987), "House Nation" by House Master Boyz and the Rude Boy of House (1987), "Theme from S'Express" by S'Express (1988) and "Doctorin' the House" by Coldcut (1988) in the pop charts. Since the early to mid-1990s, house music has been infused in mainstream pop and dance music worldwide.