Singer-songwriter Lynsey de Paul has died of a suspected brain haemorrhage aged 64 after complaining of severe headaches.
The star had a number of top 20 hits and represented the UK at the Eurovision Song Contest in 1977.
De Paul died in a London hospital on Wednesday, her agent confirmed.
Her biggest hit Sugar Me got to number five in the singles chart in 1972 just a year after she launched her music career.
In 1977 she teamed up with Mike Moran as the UK entry for Eurovision, held at Wembley Conference Centre, and the pair were runners up with the song Rock Bottom. The contest was won by France that year.
She became the first woman to win an Ivor Novello award after writing the top 20 hit Won't Somebody Dance With Me.
Known for her sharp sense of humour, de Paul was labelled "Looney de Small" by Spike Milligan and was a patron of the Spike Milligan Statue Memorial Fund.