In this image, the blur of people moving around in the crowd makes it look interesting, but it is also focusing on particular people who are standing, walking, moving in what looks like a busy area. A slow shutter speed is used in this image.
Gwyneth Paltrow and her mother Blythe Danner by Annie Leibovitz. This is such a beautiful portrait because it highlights the beauty in both mother and daughter. Gwen's closed eyes really draw you in to her mother.