The star effect is common in cameras when a point-source light is included in the frame. However, you normally need to stop-down the aperture of the lens to see it well.
The first things I would look at would be to clean the camera lens and check for scratches.
No but the thing is when i do this thing with a camera of other model this does not happen .. Lg fails in eleminating flares of light source this Is also very common on google for this model