Indie rock originated in the 1980s in both the UK and US, with subgenres including indie pop and jangle pop. While indie originally suggested outsider status, many indie artists found commercial success in the 2000s due to changes in the music industry and the internet. Key early American indie artists included R.E.M. and 10,000 Maniacs, while British artists included The Smiths and The Housemartins. In the 1990s, grunge and punk revival bands also achieved mainstream popularity, blurring the lines between indie and alternative genres. Common musical elements of indie rock include guitars, bass, drums, keyboards and an emphasis on vocals that are distinct from the beat.