Happy Halloween, Gold Diggerites. I'm trying something different today in honor of these scary times. Everyone knows celebrities love to play dress up—but it's not just on a movie set. In fact, a number of stars have popped up in their Halloween costumes early. Here's a countdown of the 8 weirdest so far. 

Ready? At No. 8, we have Adrian Grenier in blue spandex. Maybe he's auditioning for the new Smurfs movie? At No. 7, the woman who starred in the original "Halloween" looks like a bad circus act. Neil Patrick Harris clowns around at No. 6. You have to give him props, though. He's got a bigger fake nose than Nicole Kidman in "The Hours."

Moving on to No. 5, Teri Hatcher dresses up as the evil queen from Alice in Wonderland. And Paris Hilton is Alice herself at the Playboy Mansion. Ok, that's not scary. That's ... sexy. (You thought I was going to say hot, didn't you?)  

Number 3: Ashley Olsen is said to have dressed up as a vampire. I can't find a photo. But you can see the resemblance here.

Can anyone figure out Reese Witherspoon's costume at Kate Hudson's party? Seriously, post your best guesses below. From the same picture above, Jake Gyllenhaal is in hiding.

And the No. 1 celebrity on our list ... Britney! Britney! Britney! No, she isn't a Slave 4 U. She's a pirate.