MP Baey Yam Keng has since clarified on his Instagram photo that the picture was not photoshopped but taken in May when he was in Paris:

I was in Paris in May as part of President Tony Tan's state visit delegation. It is such a beautiful city with a rich culture. The recent multiple attacks by gunmen and perpetrators with explosives resulted in many innocent lives lost. My heart goes out to those who have lost their loved ones. Such planned acts are mindless but very real. This is a common security challenge that many countries, including Singapore, face in the world today. There is a need for constant vigilance and no place for complacency. #prayersforParis #peace

A photo posted by Baey Yam Keng 马炎庆 (@baeyyamkeng) on Nov 15, 2015 at 2:39am PST

However, the Internet people have agreed it looks photoshopped:

And they have started to play "Where's Baey?":