'Pretty Little Liars' Halloween special: Adam Lambert and more in preview clips

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Just two weeks before "Pretty Little Liars" airs its second annual Halloween special, "PLL" fans. Check out these sneak peek clips. In the clip above, Adam Lambert makes his debut as a fang-tastic vampire performing for the Rosewood Halloween party on a train. Fun stuff.

Below, Aria, looking super cute as a flapper, meets Glambert, as this year's lurking creeper in a theatre mask looks on and possibly poisons Aria's drink.

And finally, Spencer and Toby get their Bogart and Bacall on, then Noel Kahn starts choking and Toby saves the day. Hmm.

The "Pretty Little Liars" Halloween episode airs Tuesday, Oct. 23 at 8 p.m. ET/PT on ABC Family.

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Photo/Video credit: ABC Family