Tonight is the big Gossip Girl 100th episode and the entire season has been leading up to the royal wedding that may or may not actually take place tonight.  Despite some ups-and-downs, Blair seems determined to go through with the wedding tonight.  But even after walking down the aisle, will she pull a runaway bride?

There are definitely some hurdles to overcome in tonight's Gossip Girl.  First, there's Dan, who will somehow manage to become Louis' best man.  After writing the prince's wedding vows last week, we can't help but wonder whether he'll crack and try to convince Blair not to go through with the wedding.  Then there's Chuck, who clearly loves Blair a great deal, even if he can't really understand why she changed her mind about them after the accident.  He has apparently assured Nate that he won't interfere with the wedding, but we can see in the photo above that he does decide to visit Blair (possibly just before she walks down the aisle).  Plus, we know from the clips for tonight's episode that Georgina is back in town and prepared to cause trouble for Blair.

All of the press who have screened the episode have said that it's worth the hype.  But everyone is (understandably) mum on the ending.  Will Blair pull a runner?  If she does, will she choose Dan or Chuck over her prince?  Or will she dump all the men in her life and try the single life for a while?

Shall we play a little Gossip Girl guessing game to waste away the hours until tonight's episode?  We've got two polls for you below.  The first is whether you think Blair will actually go through with the wedding.  The second assumes she doesn't - in which case, choose which man you think she'll end up with.

For more details about tonight's Gossip Girl (airing at 8:00 p.m. EST on The CW), read Emma's preview, which has links to previews, featurettes and photos.