Sigríður Beinteinsdóttir, better known as Sigga, is an Icelandic singer who competed for her native country in the Eurovision Song Contest three times. She was born on 24 July 1962 in Reykjavík.
She managed to get three 12-point votes overall, two from the United Kingdom and one from Portugal. With Stjórnin, she achieved Iceland's best result of fourth place until 1999, when Selma Björnsdóttir came second.