The third annual Halloween episode of ABC Family’s ‘Pretty Little Liars’ airs Tuesday, Oct. 22
"Pretty Little Liars" debut Halloween episode
Spencer stood out like-- well, like a teenager dressed as Mary Queen of Scots
Aria went for a Morticia Addams-inspired gothic ensemble
Emily wasn't afraid to show a little skin as Disney darling Pocahontas
Who could forget? Hanna as the "Baby, One More Time..." pop star herself, Britney Spears
The mysteriously on-again-off-again dead girl Alison DiLaurentis as Lady Gaga
The second Halloween episode offered up some more mature costumes
Ms. Montgomery opted for a vintage flapper look as Daisy Buchanan
We had to do a double take-- is that Hanna or Marilyn?
Spencer's look is reminiscent of Marie "Slim" Browning in the 1944 film "To Have and Have Not"
Emily stuns in a retro Barbarella costume
We can't tell you what exactly the Little Liars are going as this year-- but one thing's for sure: Nobody rocks a cinched waist and funky hat like these fashionistas
Aria and Hanna in contrasting steam-punk gowns
Something spooky is coming
But seriously-- don't these girls realize they could just move out of Rosewood?