The TV presenter, who has dramatically slimmed down since playing Mama Morton in the London theatre production of 'Chicago', is keen to share her weight loss tips and has asked her drag queen pals to join her for the exercise routines.
A source said: "She has enlisted the help of her cross-dressing friend Jodie Harsh and her other drag queen friends to make the video a camp, show-tune packed extravaganza.
"She wants it to be a hedonist's guide to toning up. So many exercise DVDs can be boring, cynical and useless - she wants this one to be different."
The 23-year-old star recently admitted she didn't realise she had lost weight preparing for her theatre role until her clothes became too big for her to wear.
She said: "I don't diet, and I didn't even realise I had lost weight until a dress literally fell off me. But recently, for the first time in my life, I actually put on a dress and thought, 'You look beautiful.'
"I spent a good 20 minutes looking at myself in the mirror thinking, 'I never, ever thought you would look like this.' "