Many YBF celebs partied it up for Halloween in some interesting costumes.  See Diddy and his boo Cassie partying at the Playboy Mansion and Kim Kardashian and Kanye West in NYC inside.....

Celebs were out and about over the weekend getting into all kinds of Halloween mischief.  

Diddy partied alongside son Quincy when he wasn't doing his Prince impressions at the Playboy Mansion.  His girlfriend Cassie tapped into her Egyptian sexy for the ocassion. It looks like he's recovering well from his accident. 

But why does Diddy's outfit look like it came from a party store at the mall?

Quincy caught all the footage on his two cameras.

Russell Simmons pay homage to the Run DMC days and dressed like his brother. He partied it up at the Playboy Mansion as well.

Chris Brown was seen leaving the Playboy Mansion in his new Lambo.

And it looks like Draya Michele was unfazed by the recent "BBW LA" firings.  She went dressed as a bride....on her honeymoon night.

She posted to Instagram, "Basketball wife my ass. Waaaaayyyy baaaaaaddddder ! and "Married to none. Wanted by many."

Over in NYC:

LaLa Anthony looked PURRfect in her costume.

She posed with Kim Kardashian (as a mermaid) on the Midori Halloween party carpet in New York City. We haven't seen them hang out together in a while.

The ladies shared a Midori cocktail....one of many companies Kim attached her name to....of course.

Kim made her way through the party with her boyfriend Kanye West as he stood on the sidelines and took pics of her.

The couple played on a "nautical theme" with Kayne dressing as a "Captain."

The were spotted getting kissy.

Was Victoria's Secret model Jessica White dressed as a Victoria's Secret model?

Trina Braxton got her "Wonder Woman" on at designer Reco Chapelle's party in Atlanta.

Big Boi and his wife Sherlita hosted their own party in Atlanta and went as Star Wars characters.

Seal and his date (Heidi's not the only one who moves fast!) dressed as NBA players. When he was with Heidi Klum, they also dressed as a couple for her Halloween parties.  

Evan Ross partied with his girlfriend.

Photos via INFphoto.com/Andres Otero/WENN.com/Splash/PacificCoastNews.co