And the star is also encouraging her fans to donate and raise money to help the charity fund more life-saving research into breast cancer.
The powerhouse said: "To be able raise awareness and people's spirits is all I want to do, so I'm going to hit that dance floor every weekend, to not only try my best to win the competition, but with an extra incentive knowing every penny I receive will help beat cancer sooner.
"Once I realised I was doing 'Strictly', I immediately tried to think of how I could use it to do something positive. So I'm making a personal donation to Cancer Research UK, and during my time on the show I hope to raise even more money through donations to fund the charity's world-leading scientists to help improve the outlook for women with breast cancer."
Anastacia, who was first diagnosed with the illness in 2003 aged 24 and again ten years later, after which she took a career break for two years, has admitted her personal experience of battling the disease twice has encouraged her to help make a difference.
Anastacia - who made her debut performance on the first live show this weekend, which saw her complete the Cha-Cha-Cha to 'Lady Marmalade' by Patti Labelle - explained: "After beating breast cancer twice, I'm really passionate about trying to do something to help change the odds for others who are affected by this terrible disease. It's so important for everyone to know what's normal for them and see their doctor with any changes, as spotting cancer at an early stage can make a huge difference."
To help make a donation to the cause visit
cruk.org/Anastacia.
