Brothers Chua Jin Chou, 12, and Chua Jin Sen, 6, are the stars in a series of videos which have garnered 1.5 million YouTube hits.
In the videos, Jin Chou and Jin Sen, better known as Big Brother and Dr Jiajia, speak Singlish in a variety of situations.
Their YouTube channel was the most popular Singaporean comedy channel for March. The series, simply titled Singlish, is now “airing” its 20th episode.
Big Brother and Dr Jiajia's father came up with the first video two years ago as part of his son's school project.
But the man who writes the scripts, edits the videos and posts them online, chooses to remain in the shadows and wants to be known only as Mr Chua. He spends up to five hours editing each video before uploading them.
The videos' popularity surprised him. He said: "At first, it was just to amuse ourselves, but some viewers started sending messages on how the videos were funny and helped them relax."