By day, they are fed and watered by a small army of dedicated volunteer feeders - office workers heading home, hipsters heading out, ageing "aunties and uncles".
But at night, a hardcore of cat-lovers take to the streets.
"This cat is very special," says a slight man in a loose T-shirt and flip-flops, crouching down by a tower block in northern Yishun district.
"She will let me know she is here, but whenever I go to her she will run away. Then when I appear to be going away, she will chase me."
True to form the cat - called Orange because she is - runs after us as we walk away into the night. Full story...