They really went all out!

It's officially Halloween, so you know what that means.... celeb costume time! While we'll have to wait until tonight to see more, a few of our favorite stars have already given us a peek at their looks, and they did not disappoint!

Beyonce donned a cropped wig and went as "Phony Braxton," which if you don't follow, is a play on Toni Braxton. Kylie Jenner made herself up as Barbie, while Khloe and daughter True dressed up as adorable tigers, complete with a painted face for the reality star.

Mariah Carey and boyfriend Bryan Tanaka did a cute couple's theme and went as a doctor and a nurse, while Nicole Kidman and Keith Urban were a ninja and a kitty cat.

Giuliana and Bill Rancic did their best Bradley Cooper and Lady Gaga in A Star is Born, while Pink and her son Jameson were pirates. Our favorite? Lisa Rinna as her Real Housewives of Beverly Hills co-star Erica Jayne!

We really just want to know what Kim Kardashian is going to be!