Jessie J was born Jessica Ellen Cornish in Chadwell Heath, London,[8] daughter of Stephen Cornish and Rose Cornish (née Archer). She was educated at Mayfield High School in the London Borough of Redbridge. She attended Colin's Performing Arts School and as an 11-year old-was cast in Andrew Lloyd Webber's West End production of Whistle Down the Wind.[9][10][11] Jessie has two sisters, who are five and seven years older than she is, who were both head girls at school. Unlike her academic sisters, Cornish has stated she was "never really that good at anything". She said, "At school they were like 'oh, you're a Cornish girl' and they kind of expected me to be the same as my sisters. Give me something to draw or an outfit to pick for someone, or hair, make-up, acting, write a song, I'm fine with it, but anything to do with sums – it was never my thing." She also said she never based her intelligence on her exam results.[12] She also said she was always good at singing and it was her "thing". At the age of 16 she began studying at the BRIT School and at 17 she joined a girl group named Soul Deep.[13] She graduated in the class of 2006 along with singers Adele and Leona Lewis.[14] At 18, she suffered a stroke as a result of Wolff-Parkinson-White syndrome .…