Depends on where your tax home is and whether or not Singapore has a Tax Treaty with that country. As an example, the US does not have a tax treaty so you pay taxes in both places on the same income. (with certain breaks given by the US - no breaks given by Singapore).
SOME PEOPLE TRY TO TURN BACK THEIR ODOMETERS. NOT ME. I WANT PEOPLE TO KNOW WHY I LOOK THIS WAY. I'VE TRAVELED A LONG WAY, AND SOME OF THE ROADS WEREN'T PAVED. ~ Will Rogers