Vocaloid
Vocaloid' is a software program that makes a voice. This voice is recording real person's voice. The user can type in lyrics and a melody and it will synthesize singing. A popular vocaloid is Hatsune Miku. Amateurs can use vocaloid, so many songs are created. Some songs are favorites. Moreover this company sells Hatsune Miku. People can listening to these Vocaloid songs on websites like YouTube. They are also sold on CDs and Games.