the clips of the actors (ed westwick & leighton meester) that u may not recognize from GG are simply from other shows like Entourage, House, etc. for meer info, check their IMDb pages!
I spent a lot of time on this vid. It's from Chuck's POV and i just think this song fits Chair perfectly. It's door Apoptygma Berzerk. It's pretty self-explanatory but pay attention to the lyrics.