Hi,Try going up to Kent Ridge,Just higher up the campus,may have some nice view and background.The carparks behind the campus near Pasir Panjang road.
If you have transport,there's a park nearby on a hill near the famous last stand of malay sargent during world war 2,forgot the name of if. Best to check out the maps to get your bearings.
i will ask her when met up her,but when she go in to the hall of the ceremony i need to wait ard 1 n half hour,so i wan walk ard n take some view in the sch