Born and raised in London, she began her career on stage, aged 11, with a role in the West End musical Whistle Down the Wind.

Citing various influences, Jessie J is recognised for an unconventional musical and performance style[6][7] that mixes soul vocals with contemporary R&B, electropop,[8][9] and hip-hop beats.

Jessie J has supported various charitable causes, and has appeared on the UK charity telethons BBC Children in Need and Comic Relief.

She attended Colin's Performing Arts School and as an 11-year-old she was cast in Andrew Lloyd Webber's West End production of Whistle Down the Wind.

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."

In 2003, at age 15, she won Best Pop Singer in the TV show Britain's Brilliant Prodigies, performing as Jessica Cornish.

[20][21] Jessie J was also part of a girl band, called Soul Deep, for two years, however, believing "it wasn't going anywhere", she left the group.

Later in the year a change in management to Sarah Stennett and Nadia Khan of Crown Music allowed record deal negotiations to take place.

[25] Jessie J says the album's title track, "Who You Are", is one of her proudest creations, she said the song is a "positive role model for young people" and "I always say that I'm half-artist, half-therapist".

However, in late 2010 Jessie J released her first single, "Do It Like a Dude" which was co-written with George Astasio, Tj Normandin, Jason Pebworth, Jon Shave, Kyle Abrahams and Peter Ighile.

[37] Jessie J served as the house artist at the 2011 MTV Video Music Awards, performing several of her original songs along with covers around commercial breaks.

[38] On 12 June 2011, at the Summertime Ball held at Wembley Stadium, London, Jessie ruptured several tendons in her foot during rehearsals, and performed her set the following day while sitting on a gilded throne.

Her record label released an official statement on 30 June 2011 that under strict orders from her doctor, she would not be able to perform for a number of weeks so that she could recuperate properly.

James Morrison's third studio album, The Awakening features a collaboration with Jessie J called "Up", the song was released as a single on 16 November 2011.

[44][45] The following week the song climbed twenty-one positions to number five,[46][47] making it her sixth top ten single from one album.

[citation needed] On 12 August 2012 she performed "Price Tag", "Written in the Stars", "Dynamite", and "You Should Be Dancing" with Tinie Tempah and Taio Cruz, and "We Will Rock You" with Queen at the Closing Ceremony of the 2012 Olympic Games in London.

Jessie has also revealed on Twitter that she worked with Diane Warren and co-author of her song "Price Tag", Claude Kelly.

Jessie also featured on DJ Cassidy's debut single "Calling All Hearts", along with Canadian singer Robin Thicke.

[5] In the nominations for the 2016 Brit Awards, Jessie J's 2015 single "Flashlight" (from the soundtrack to the film Pitch Perfect 2) was among the nominees for Best British Video.

In 2016, Jessie J joined the cast of voices for Ice Age: Collision Course singing the movie's theme song "My Superstar" (written by Alexander Geringas and Nikki Leonti[64][65]) featuring Tha Vill.

[74] In December 2018, Jessie J confirmed that she would be appearing as a coach on The Voice Kids UK alongside Pixie Lott, Danny Jones and will.i.am for its third series.

In terms of previously recorded music, Jessie J elaborated that some of the songs could be re-recorded, scrapped or allocated elsewhere but she was not sure if they would appear on the album.

[82] Although Jessie J was first identified as a soul singer, she primarily records songs of R&B and pop music with hip hop influences.

Perpetua added: "Her idea of showcasing her gift is to shoot for a blaring melisma on "Mamma Knows Best" that makes Christina Aguilera seem as subtle as Joni Mitchell by comparison.

She said, "Her hard work, her dedication, and how she deals with having the world stare at her every move, personally and professionally, with such dignity and strength, is inspiring.

"[86][87] Entertainment Weekly's music critic Adam Markovitz said of Jessie: "The 23-year-old Brit has all the tools, from a monster voice to an ear for hooks—she co-wrote Miley Cyrus' 'Party in the U.S.A.'—and a manic persona that's equal parts Katy Perry, Kristin Chenoweth, and Alice Cooper.

[94] She identifies as a feminist, and believes that equal rights should be a normality and that her responsibility as a woman includes "being confident and not standing down for any ego or suit".

She cited work opportunities and dissatisfaction with the level of focus in the UK on her personal life rather than on her singing, saying, "In America they see me as a singer whereas here I feel that people don't appreciate my voice.

[107][108] Jessie J has appeared on the major UK charity telethons, Children in Need and Comic Relief, both broadcast on the BBC.

"[109] On 15 March 2013, Jessie's head was shaved live during Red Nose Day 2013, helping to raise money for Comic Relief.