Looks like Serena is taking a page from her fake cousin's book.
On the second-to-last episode of Gossip Girl's fifth season, titled "The Fugitives," Serena poses as Blair at an important meeting when B finds herself needing to be in two places at the same time.
Blake Lively playing Blair was teased in the spoilers we posted yesterday, and this helps explain it somewhat. Unlike Ivy's tangled web of lies, at least Blair is apparently in on this identity switch-up.
The question is ... why? What meeting is so important that it can't be moved? And where else does Blair have to be at the exact same time? We're interested to read your theories in the comments.
Speaking of Ivy, she teams up with Lola in this episode (airing May 7) to help Chuck with a personal vendetta, while Nate makes a decision about the future with the mysterious Diana Payne.
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