Karaoke / ? k ?r i ? o? k i / or / ? k ?r ? ? o? k i / Japanese: , is a form of interactive entertainment or video game in which an amateur singer sings along with recorded music using a microphone and public address system The music is typically an instrumental version of a well-known popular song Lyrics are usually displayed on a video screen, along with a moving symbol, changing color, or music video images, to guide the singer. In China and Cambodia, a karaoke box is called a KTV. It is also a term used by recording engineers translated as "empty track" meaning there is no vocal track. The global karaoke market has been estimated to be worth nearly $10 billion.