There are free performances that are held at the Esplanade. They are usually held outdoors just beside the beaufiful waterfront.
This is a picture of a group doing sound checks. They are quite good! They were doing an acapella. We noticed that the lady at the most right has very very deep voice. She was doing the drum beats simulation part.
I caught this picture from the rooftop of Esplanade which is open if you wanna take photos of surrounding areas or the sunset.