20+ Instagram Pics of Celebrities Dressed Up For #Halloween

While everyone is busy being Miley Cyrus for Halloween, Miley Cyrus is busy being Lil Kim from the 1999 VMAs, complete with purple bodysuit and nipple pasty. Well done.

Fergie and Josh Duhamel took a night off from their newborn son, Axl, for a Halloween date night. Like their take on Elvira and Riffraff? Fergie's boobs look unreal.

Jessica Alba, Cash Warren and pals put on their best silk robes (?) to dress up as the Witches of East End.

Rachel Zoe and her longtime hubby Rodger Berman paid homage to Cher and Sonny. This costume was a perfect match for Rachel's everyday boho-chic style.

Leave it to Glee star Chris Colfer to make a robot look sexy! He attended Jared Eng's Halloween party as a "sexy R2D2."

And speaking of sexy Gleeks..that's Naya Rivera as the best-looking Carmen Sandiego the world has ever seen. Yowza.

Chord Overstreet and his brother dressed up as the guys from Sons of Anarchy. Charlie Hunnam would be proud.

And last Glee costume we promise, but how cute does Lea Michele look as a pretty little dutch girl?!

Even though Chelsea Handler's made it clear that she's not exactly the motherly type, she did look pretty awesome as a pregnant lady for Halloween.

Sarah Hyland and Matt Prokop nailed it as Beauty and the Beast.

The staff of E! News collectively dressed up as the Real Housewives. That's Terrence Jenkins as Nene, Giuliana Rancic as Teresa, Ali Fedotowsky as Gretchen and more! Can you guess the others?

A far cry from the clean-cut Hanna Marin on PLL, Ashley Benson dressed up as a emo chick.

And so did Vinny Guadagnino from Jersey Shore! Nice eyeliner, bro.

Snooki and Jwoww dressed up as good vs. evil queens on Friday night, which was appropriate since the red carpet event they attended was in honor of RuPaul's Drag Race...

But then later, the ladies dressed up as Tweedle Dee and Tweedle Dum....

...and each had their own gay Joey in tow. Beyond cute.

The cast of E!'s Fashion Police went to work as their favorite fellow celeb. Kelly dressed as Christina Hendricks, Giuliana as Sofia Vergara, George as Lena Dunham, Joan as a fat Miley, and Melissa as Giuliana. Clever, guys.

You know how James Franco can play basically any kind of character in a movie? Same goes for Halloween. Scariest male witch ever.

And because this was inevitable, Hugh Hefner and his wifey Crystal Harris went as Robin Thicke and Miley Cyrus.

Paris Hilton dressed up as Miley, too! Just being honest here, this is the most relevant thing Paris has done in a while.

Lori Loughlin, aka Aunt Becky, and her hubby dressed up as Bert and Mary from Mary Poppins. Nailed it!