Google released its list of the most searched people of 2013 on Tuesday, and not surprisingly, Miley Cyrus received the coveted No. 1 spot.
If first person is someone telling you his or her story, and second person is you being told how you should do something, then third person is more like a camera recording events. That's not to say it's necessarily an objective point of view. A third person narrator can be highly subjective.
To put it briefly and precisely: The first person refers to the person speaking. The second person refers to the person spoken to. The third person refers to the person or thing spoken about. This goes for both the singular and the plural.