Of Irish origin, Fiona was born in Phillipsburg (New Jersey) after her parents moved from Dublin to the United States. Brought up in a family of Catholic traditions, right from childhood she felt drawn towards traditional Irish music and even learnt to play the clarinet at school. Even when she was awarded a grant for the University School of Drama in New York, she decided on a musical career.
There are videos for the songs "Talk To Me" from Fiona, "Hopelessly Love You" and "Living In A Boy's World" from Beyond The Pale, "Everything You Do (You're Sexing Me)" from Heart Like A Gun, "Hearts Of Fire" from the Heart Of Fire soundtrack, and "Where the cowboys go" from "Heart like a gun". The Hearts of Fire (soundtrack) features 4 exclusive otherwise unreleased songs from Fiona.
She also guested on Warrant's Cherry Pie album, appeared in an episode of the US television show Miami Vice (Season 2, "Little Miss Dangerous"), and acted in the movie Hearts of Fire. Winger members Kip Winger, Reb Beach, and Rod Morgenstein have played on Fiona's albums.
Fiona was once married to producer Beau Hill, who produced, played some instruments on, and sang backing vocals on, some of her albums. She was also in a relationship with guitarist Reb Beach of Winger who likewise performed on her album "Beyond The Pale".