Need help with this song Please

[nyplayer33]

http://www.youtube.com/watch?v=3vijc...eature=related who is this performing with Jaz Z..and what are the names of the songs at the 5 minute mark and 6:33 mark.....

[CanuckG]

rihanna at start
kanye later

5 minute mark song is cant tell me nothing by kanye west

6:33 mark is the good life by kanye west

beginning song is run this town