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Jón “Jónsi” Þór Birgisson is the guitarist and vocalist for the Icelandic post-rock band Sigur Rós. He is known for his use of a cello bow on guitar and his falsetto voice. Jónsi is blind in his right eye. He is openly gay, and his boyfriend Alex Somers has done much of the graphic design for Sigur Rós. They also perform together as an art collaboration called Jónsi & Alex. They released their self-titled first book in November 2006, which was an embossed hardcover limited to 1000 copies, along with their first album, Riceboy Sleeps, in July 2009.