Brittany Murphy's secret songs

Actress Brittany Murphy has secretly appeared on several hit singles.The 'Sin City' star - who is the guest vocalist on Paul Oakenfold's new track 'Faster Kill Pussycat - revealed she has been singing on records for years and claims some of the artists had no idea she had contributed to their music.She said: "I've worked on a lot of other people's music anonymously - a lot of rap, hip-hop and R'n'B stuff - I hear myself on the radio all the time. Some singers still don't know it was me recording on their albums."Murphy says she kept her singing talents a secret until she was comfortable behind a microphone.Meanwhile, the actress has hit back at claims she is suffering from an eating disorder - insisting she is naturally thin and has given up trying to gain weight to please people.She said: "I used to feel embarrassed about being too tiny. Then I came to terms with it and I'm proud of my body now."