[1][2] Sigríður was born Sigrid Maria Elisabeth Nielsen in Copenhagen, Denmark in 1930 to Danish/German parents.

Her catchy music incorporated everything from children's songs to kitchen percussion, and her lyrics covered from life at sea to elephants.

Sigríður stopped making music in 2009, and died in Reyðarfjörður in 2011, aged eighty-one.

[1] A documentary film about Sigríður was released in 2011, entitled Grandma Lo-fi: The Basement Tapes of Sigrídur Níelsdóttir (Icelandic: Amma Lo-fi: Kjallaraspólur Sigríðar Níelsdóttur), and directed by Orri Jónsson, Kira Kira, and Ingibjörg Birgisdóttir.

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