Exclusive Gossip Girl Spoiler: Who's That Kissing ...

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Warning: Do not follow the jump if you wish to remain surprised regarding one of Gossip Girl's more controversial, buzzed-about plot lines in some time.

This exclusive photo may confirm a dramatic development for two characters whose future has become a subject of heated debate among the fan community.

Or, it may hint at a romantic moment involving only one of said parties.

Check out who our staff member spotted kissing on the set ...

Dan and Blair Kissing on Gossip Girl!

Is this proof that it's on for Dair? If so, anyone who saw last night's episode can't be too surprised. The chemistry is there, and their feelings have been building for weeks.

And, from all indications, there is a major Dair cliffhanger set for February 28. But this isn't necessarily a scene from that episode, opening up a range of other possibilities.

The impending return of Prince Louis, for example.

Reactions? Comments? Theories on what finally brings Blair into Dan's arms, and whether this embrace will be but one of many - or if Humphrey is even the lucky guy here?

Sound off on this photo right here, right now ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.

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And who am I? That's one secret I'll never tell ... You know you love me. XOXO, Gossip Girl

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Good morning, Upper East Siders. How do you look today? You know image is everything. But under those perfect clothes and perfect smiles, everyone has their not-so-perfect secrets.

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