Real Name: Jessica Ellen Cornish
Born: 27 March 1988
Star Sign: Aries
Birthplace: Redbridge, London, England
Hometown: London, England
Did you know?
Jessie studied at the BRIT School with Adele and Leona Lewis.
She used to be in a girl group called Soul Deep.
Jessie co-wrote Miley Cyrus's 2009 smash 'Party In The U.S.A.'.
She wrote her first single 'Do It Like A Dude' for Rihanna but her record label wanted her to perform it herself.
Jessie performed on a throne at Glastonbury 2011 festival after rupturing tendons in her foot.
How Jessie J found fame:
Hit singles such as 'Price Tag' and 'Domino' have helped to cement her reputation as one of the most exciting pop stars around.