Singer Kylie Minogue lives in fear of her breast cancer returning. The '2 Hearts' singer, who began performing again late last year after battling the disease, revealed she is terrified she has relapsed every time she feels unwell or even has a headache. Kylie, who was forced to tell fans on her 'Showgirl Homecoming' tour she was too ill to carry on after contracting a respiratory-tract infection earlier this year, said: "I was fresh out of treatment when we started that tour. I was terrified and really doubting whether I had made the right decision to go on the road in the first place. I relaxed as time wore on, but that was scary, that moment. And there have been moments since then."Your body, your muscles have a memory of the way it was when you were sick, and there are definitely times when I float back to that place. I had migraines a few weeks ago, and I just went, 'Yeesh - no, please.' "The 39-year-old star - who went through a gruelling ...