"I learned that you never go back to a normal state, instead you have to create a new normal state," News.com.au quoted her, as telling Scotland's Daily Record newspaper.
"I have to accept my life for its triumphs and its other sides, take the good with the bad. I experienced a totally new environment. I experienced a world of illness and positive attitudes. The sympathy you're shown can knock you off your feet," she added.
The 39-year-old singer, who was recently presented with the Music Industry Trusts' Award, also revealed that she suffered from depression when she couldn't work because of her exhausting chemotherapy treatment.
"I had the feeling I'd been stopped in the middle of a flight. A tour needs to gain momentum. It's just like riding a bike, you need to pedal to gather speed," she said.
"Suddenly I was torn off the seat, aside from all the other things that happened to me. The depression suddenly came over but I had the goal of continuing the tour and thinking back it was a blessing in disguise.
"I had to prove I had what it takes to continue what I had done in the past," she added.