Siobhan Maire Deirdre Fahey[2] (/ʃəˈvɔːn ˈfɑːhi/; born 10 September 1958) is an Irish singer whose vocal range is a light contralto.

[7] When she was 14, she and her family moved to Harpenden, Hertfordshire, and, two years later, she left home for London and became involved in the punk scene of the late 1970s.

Fahey, with Dallin and Woodward, co-wrote many of the group's hits, including "Cruel Summer", "Robert De Niro's Waiting...", "I Heard a Rumour", and "Love in the First Degree".

[9] Initially, Fahey effectively was Shakespears Sister, though American singer/songwriter Marcella Detroit later became an official member,[10] making the outfit a duo.

[14] Following this, Fahey left the label and, after a lengthy battle, she finally obtained the rights to release the album (entitled #3) independently through her own website in 2004.

[10] Fahey briefly re-joined Bananarama in 1998 to record a cover version of ABBA's "Waterloo" for the Channel 4 Eurovision special A Song for Eurotrash.

[15][better source needed] Fahey's track "Bitter Pill" was partially covered by the pop band The Pussycat Dolls on their 2005 debut album PCD.

The verses (which were slightly altered) and the overall sound of the song are from "Bitter Pill", but added in was the chorus of Donna Summer's "Hot Stuff".

In 2008, Fahey appeared in the Chris Ward-written and directed short film What Shall We Do with the Drunken Sailor (based on the life of artist/model Nina Hamnett, self-styled "Queen of Bohemia"), with Fahey playing the role of Hamnett opposite actor Clive Arrindel, Donny Tourette (frontman with punk band Towers of London) and Honey Bane (former vocalist of the punk band Fatal Microbes).

[21][needs update] In 2019, Fahey reunited with Marcella Detroit for Shakespears Sister dates, commencing with an appearance on BBC1's The Graham Norton Show on 10 May 2019.