United Kingdom, Sept. 16 -- Anastacia has urged people fighting cancer to embrace the "good days".

The 56-year-old pop star - who was previously diagnosed with breast cancer in 2003 and 2013, having found out she had Crohn's Disease as a teenager - wants to "make a difference" in people's lives by offering advice from her own health struggles over the years.

She told OK! magazine: "I want to help people know that even if you have cancer, Crohn's disease... the more you let it occupy your thoughts on a regular basis, you are not living in the moment.

"What I try to do is make a difference in other people's lives, give them hope and faith that what they're going through is not forever.

"There's ebbs and flows, just allow your good day t...