The Australian singer broke down as she described how during a visit to a children's ward, the parents of a sick youngster showed such compassion for her.
The Sun told how during an appearance on The Morning Show, she said, 'I was talking to some parents across the other side of a bed and their child was there.
'I was saying the things that I would normally say in that situation, just making conversation with the child, with the parents, giving them some support as well, and then they really caught me off guard.
'They just eyeballed me and said 'How are you, and we hope you get through it' and it's like...'
The 42-year-old quickly became emotional and when asked about the effect that her illness had had on other women, she became so overcome that she had to leave the set.
After gathering herself, she returned and explained, 'The reason that that gets me is, and the greatest part of my job and what I do is the humanity of it and there's certain moments where that really cuts through.'
Kylie was diagnosed with breast cancer in May 2005 but celebrated five years in remission earlier this week.