A virtual musician is a member of a band or a solo act who is not real. The music itself is made and recorded by real people, but all of the media such as interviews, video clips, and even stage shows are “performed” by the fictional character. In the case of live concerts, this is often achieved with the use of holograms and other special effects.
Gorillaz
Listed in the Guiness Book of World Records as the most successful virtual band ever, with plenty of awards and platinum records to prove it, Gorillaz are not just a band, but a complex story complete with it's own virtual world fans can explore and participate in. The story has been told over 10 years through music videos, short animations, and interactive web pages.
The band is composed of 4 fictional members. 2D, the brain damaged lead singer, Noodle, the young Japanese guitar prodigy who arrived in the mail, Russel, the possessed drummer, and Murdoc, the satanic bass player.
Hatsune Miku
Hatsune Miku is unique in that she does not have someone providing her with a voice. Instead, she uses Yamaha Corporation's Vocaloid 2 synthesizing technology.
Miku's voice software is available for purchase so that fans can have her sing their own songs and the animation software used to create her "physically" is available for free.
Dethklok
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Starring in their own TV show, Metalocalypse, as ridiculously rich metal musicians who may be unwittingly bringing about the apocalypse (according to the secret government agency that watches them), Dethklok are hilariously clueless about everything but music. Their existence focuses more on their antics than their actual music. However, they still tour and have released 2 albums and many music videos.
The band consists of Nathan Explosion, the well-read yet still somewhat dimwitted vocalist, Toki Wartooth, the sweet but insane rhythm guitarist, Pickles the Drummer, the ex-glam metal band member who is almost never sober, William Murderface, the angry self-hating bassist, and Skwisgar Swigelf, the haughty lead guitarist. They are managed by the highly intelligent Charles Foster Ofdenson, whom they refer to as a butler and are also frequently accosted by a cocaine addled rock and roll clown named Dr. Rockso, who is a member of his own virtual band.