Olympics games is NOT paid-to-air, as always. It's FREE-to-air, as part of Mediacorp offerings.
The rights to air are Mediacorp and Mio-TV
Check this info:
http://en.wikipedia.org/wiki/List_of_2012_Summer_Olympics_broadcasters
^ "MediaCorp brings extensive free coverage of the best of London 2012 Olympic Games". MediaCorp. 2012-04-17. Retrieved 2012-06-30.
^ "SingTel sews up Singapore Olympic broadcast rights". Rapid TV News. 2012-03-23. Retrieved 2012-03-23.