Beyonce feat. Jay-z- Upgrade U

This song is actually one of my favourites in her latest album 'Bday'. I would have done some things differently, but they are some shots that are really good like the reflection shots and the rap scene which is a bit different from what's been done over and over again.
Beyonce has actually been credited as a director as well in this video. I wonder what she really did to get it.