I remember the PM once mentioned to the Straits Times abt going to the church on the advice of some of the cabinate members yrs back when he first suffered cancer. But after going through many life incidents, he said that he has come to accept the theory of Karma as well. That report was abt the time he was newly appointed as the PM. I think can check out the newspaper in the library.
As for MM, I also remember a report in the ST where the MM was asked by a foreign papers on his religion. He replied that he doesn't have any, but follows some simple chinese traditional practices. But when pressed for a preference, he stressed that he cannot or will not accept the belief of one Almighty Creator God; but he is more inclined towards the theory of Buddhism. Sorry I cannot recall which year was this report ( 2 yrs ago?), but I guess interested parties can check it out in the library as well.