This is the finale number of the Beyonce Experience. This is the best number in the concert, in my opinion, because this is where she connects most with her audience. This is her biggest hit as a solo artist, and understandably so.
This is the link to my review of the concert last November 7, 2007:
http://3xhcch.multiply.com/journal/item/126/The_Beyonce_Experience_The_Fort_November_7_2007