Here is the much anticipated wedding of Charles "Chuck" Bass and Blair Waldorf.
It is from episode 6x10 of Gossip Girl.

Chuck proposes to Blair: http://www.youtube.com/watch?v=z4QQX2OZ0-o
Gossip Girl Flashforward: http://www.youtube.com/watch?v=WoOyxEdZxYY
Dan Serena Wedding: http://www.youtube.com/watch?v=1BVxmFKJQCU
Gossip Girl Revealed Reactions: http://www.youtube.com/watch?v=_odtRwsADnI
Clip is from the CW.