Represented Portugal in the Eurovision Song Contest in 1996 in Oslo, and got the best result ever for a Portuguese song in that contest. The song was called "O Meu Coração Não Tem Cor," which means "My Heart Has No Color.".
She started to learn the violin and piano when she was 14.
Has a daughter, Júlia Moniz Bettencourt (b. June 8, 2004, in Açores, Portugal).
Júlia's father is Lúcia's ex-partner Donovan Bettencourt (born 1975), a musician who plays in a band called Mourning Widows.
Both her parents are singers. Her father is Carlos Alberto Moniz and her mother is
Maria do Amparo Pereira.
Has a sister, Sara Moniz, and two half-brothers, João Salvador, born 1994 (from her father's marriage to Idália Serrão); and Paulo (from her mother's marriage to Samuel Quedas).