Tourist and Business visas are not required for citizens of Mexico for a stay up to 30 days. However, your passport must have at least one blank visa page and be valid for six months.
Fast Passports & Visas always recommends checking with your airline as requirements may change without notice.
Singapore requires that citizens of most countries obtain a visa to enter.  The Consulate General of Singapore will determine the duration of stay upon receiving an application.
Business Travelers
Travelers visiting Singapore for the purpose of attending business meetings/discussions/negotiations.
Social Visit 
Travelers visiting Singapore for the purpose of visiting friends, relatives, or tourism.