With which band was Guðmundur Gunnarsson's daughter initially the lead singer ?
Guðmundur Gunnarsson:  The father of the singer Björk (Björk Guðmundsdóttir), he is a nationally known figure in his own right as the leader of the Icelandic Electricians' Union, Rafiðnaðarsamband Íslands (RSÍ). Björk:  She initially became known as the lead singer of the alternative rock band The Sugarcubes, whose 1987 single "Birthday" was a hit on US and UK indie stations and a favorite among music critics.
The Sugarcubes,