Today, Singapore will be able watch a TV commercial for WeChat. In this commercial (according to Tech in Asia), Rainie Yang (楊丞琳) and Show Luo (羅志祥) will star in it. They will play a couple showing you different features of the app.
Here is the TV Commercial. According to source, it is same as the one showing in Taiwan.
From Tech in Asia:
..you will be able to catch the TV ad on Channel 8, Channel U, W drama, and E-City starting this week.
Click Here to read more information from Tech in Asia
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(source)