Nightwish frontwoman Floor Jansen has revealed she is suffering from breast cancer.

In a post of social media(opens in new tab), Jansen states "my prognosis is very good"

nd says that the cancer seems non-aggressive and has not spread.

She will be undergoing surgery to remove the tumour tomorrow and also

states she is hopeful of making the start of Nightwish's upcoming European tour,

which kicks off on November 20 in Antwerp.

The full statement reads: "A letter to you. Life comes in waves, with ups and downs.

"I have had the joy of riding many highs, and I have shared these with you

through social media and the many many shows worldwide throughout the many years of my career.

But now a new wave hit me. Not a good one.

I have breast cancer