Credit: Richard Foreman/ABC Family Channel © 2010 Disney ABC Television Group Photo: Pretty Little Liars Halloween Episode: Alison and Jenna Talk

In this sneak peek for the Pretty Little Liars Halloween episode, we get to see Alison (Sasha Pieterse) and Jenna (Tammin Sursok) face off for the very first time — over a Halloween costume! It turns out both girls were on the cutting edge of pop, and wanted to go as Lady Gaga, back before she was mainstream. Alison goes into full-on fake-nice mode, telling Jenna to back down and leave the Lady G fabness to her —  with a smile, of course.

But before you start hating on Ali too much, watch the very end of this clip: It looks like Rosewood's resident mean girl had some stalker problems of her own.

 

Credit: Hulu Photo: Pretty Little Liars Sneak Peek: A Pretty Little Showdown on the Halloween Episode

Don’t forget to tune in for the special episode on Wednesday, October 19th at 8 pm ET/PT on ABC Family.

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