This is Noah Ong. The little brother of Ethan Ong - Singapore's youngest busker.
(Hmmm I wonder if Noah has taken over the title)
Usually we see Ethan playing, but last Saturday afternoon, we saw it was a younger boy.
Ethan and his dad was at the side enjoying Noah playing Hillsongs on the drums.
I posted Ethan once last year, view it here if you want to recollect.