Next Slideshow: Steppin' Out: Jennifer Lopez, Casper Smart & Emme Anthony, Sofia Vergara and more
Kitty and Fishy: Best buds La La Vazquez Anthony and Kim Kardashian dress as a cat and mermaid at the Midori Green Halloween Party on October 27 in New York City.
Happy Girls: Cameron Diaz and the newly-engaged Jennifer Aniston have matching smiles at LACMA 2012 Art + Film Gala Honoring Ed Ruscha and Stanley Kubrick presented by Gucci on October 27 in Los Angeles.
Political Pals: Jada Pinkett Smith and Salma Hayek host a Victory for Obama Fundraiser at the Smith home in Los Angeles on October 25.
In Character: Zoe Saldana films Nina in Los Angeles on October 26. There has been much controversy over Zoe playing the part of the legendary jazz musician Nina Simone.
Xtina and her Knight: Christina Aguilera and her boyfriend Matt Rutler show off their Halloween costumes outside her home in Beverly Hills on October 27.