Hatsune Miku is a virtual singing voice synthesizer software developed by Crypton Future Media, launched in 2007. She is personified as a 16-year-old girl with long turquoise twintails and is known as a virtual idol. The software uses Yamaha's Vocaloid technology allowing users to create songs with her voice, which is based on samples from Japanese voice actress Saki Fujita. Hatsune Miku has become a cultural phenomenon, appearing in live holographic concerts worldwide, with over 100,000 songs created using her voice. She also has a strong fanbase and widespread marketing, including collaborations and merchandise, making her an iconic global virtual singer.