Who sang the advertising song of Disney World?

The version you said was sung by Wu AK Ng, who is in charge of drums, Kama Lo, the lead singer, and Hui louisa Ng, who is in charge of guitar playing.

"Small World" is an eternal classic song, composed by the brother who won the Oscar.

Small World made its debut at the new york World Expo to raise money for UNICEF. In Walter? Under the personal supervision of Disney, Little World was very popular in the World Expo for two consecutive seasons from 1964 to 1965, and then it was shipped back to California Disneyland and reopened on May 28th.

Because it is very popular with tourists, every Disneyland in the world (including Hong Kong Disneyland) has a "small world", which is regarded as a classic scene in Walter Disney.