Jessica Ellen Cornish (born 27 March 1988), better known by her stage name Jessie J, is a British singer and songwriter. She signed a record deal with Island Records and began recording her first debut album, Who You Are.

She first saw fame when she began writing tracks for Justin Timberlake, Alicia Keys, Christina Aguilera and Miley Cyrus. The most successful track she co-wrote is "Party in the U.S.A.", which gained Platinum certification in many countries. On January 7 2011 Jessie J came top of the BBC's Sound of 2011 list. She followed this in February by picking up for a Critic's Choice.

She released her first single, "Do It Like a Dude" which missed the top-spot by Bruno Mars. Jessie released her follow-up single, "Price Tag" which went straight to number-one on the UK Singles Chart. It remained at number-one for two exclusive weeks. Her debut album was released on 25 February 2011 and charted a number-two on the UK Albums Chart. Subscribe now to one of the premier Youtube fansites for the best Jessie J performances.