COSTUME ROUNDUP: Diddy & Cassie, Kanye & Kim, Trina Braxton And MORE ROCK OUT With Halloween Looks

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.  

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.

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.