The `Price Tag` singer - who was cast in Andrew Lloyd Webber`s `Whistle Down the Wind` as a child - wants to return to her roots and has started working on her own stage show.
She said: "I would love to do musicals. That is what I trained in. I`ve started writing one but it`s kind of been put to the side."
Jessie - who was diagnosed with a heart condition as a child and suffered a stroke at 18 - wants the show to inspire youngsters to achieve their dreams.
Explaining the script, she told the Radio Times: "It`s about life and feeling good. It`s about time there`s something on stage that kids can go to and come out thinking they can take on the world and do something with their life if they`re in a bad place."
Now working as a mentor on `The Voice`, Jessie believes the tough love of one of her teachers helped her become a star, and insists she wants to do the same for her contestants on the show.
She said: "I`m the most critical because I remember what it takes to make it. I used to have a teacher who made me cry. She said she was tough on me because she knew I had potential."