Glow is performed by Hatsune Miku. Hatsune Miku (初音ミク) is a singing synthesizer application with a humanoid persona, developed by Crypton Future Media. She uses Yamaha Corporation's Vocaloid 2 and Vocaloid 3 singing synthesizing technology. She was the second Vocaloid sold using the Vocaloid 2 engine, and the first Japanese Vocaloid to use the Japanese version of the Vocaloid 2 engine. Her voice is sampled from Japanese voice actress, Saki Fujita. Hatsune Miku has performed at her concerts onstage as an animated projection. Hatsune Miku is portrayed to be a 16-year-old girl with long turquoise pigtails.
Glow is well known by people and if you like it, you can also download free Glow sheet music here. Just Enjoy It!