Jónsi is a pseudonym of, at least, two Icelandic artists: 1) Jón Þór Birgisson is the lead singer and guitarist for Sigur Rós and half of Jónsi & Alex, known for his soft falsetto voice . He released his solo debut album, Go, on April 6, 2010. Birgisson grew up in Iceland, raised by parents who weren't particularly musical; his early memories include playing The Beatles at double speed on his turntable and listening to and playing along with Iron Maiden records.

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