For those people who have no idea on how to get to Pasir ris Costa Sands Resort,
I just found out that there is a shuttle bus from Pasir Ris MRT Station!
Yay for me!
click on the link to see the scheduled timings of the arrival of the shuttle bus!
http://www.asiatravel.com/singapore/costa_sands_pasirris/location.html#time
aeri :)