Post-grunge is a subgenre of alternative rock and hard rock that began in the 1990s. Although it's a subgenre of alternative rock and hard rock, post-grunge was also originally a label that was used almost pejoratively on grunge bands that emulated the grunge sound and that emerged when grunge bands such as Nirvana and Pearl Jam were popular. Bands that were labelled almost pejoratively as include Bush, Candlebox and Collective Soul. Post-grunge morphed in the late 1990s, with many bands different from the earliest post-grunge bands emerging. During the late 1990s, post-grunge morphed into a derivative of grunge that uses the sounds and aesthetics of grunge, but with a more commercially accessible tone. became popular in the 1990s and continued being popular in the 2000s. Post-grunge bands such as , Puddle of Mudd, Staind, Nickelback, Creed and Matchbox Twenty all achieved mainstream success.