Steppin' Out: Christina Aguilera, Daisy Fuentes, Alessandra Ambrosio and more

1. 110112 Steppin Out Christina Aguilera

School Party: Christina Aguilera leaves a Halloween party at her son's school in Brentwood, California on October 31.

2. 110112 Steppin Out Daisy Fuentes

Casual over Costume: Daisy Fuentes dresses casually for shopping at Bristol Farms in West Hollywood on October 31.

3. 110112 Steppin Out Alessandra Ambrosio

Lucky Lady: Alessandra Ambrosio was one of the lucky few to get a flight into JFK Airport in New York City on October 31.

4. 103112 Steppin Out Jenni Rivera

Moving On: A month after filing for divorce from husband Estaban Loaiza (not pictured), Jenni Rivera appears happy when leaving the Newsroom Cafe in Beverly Hills with her manager on October 29.

5. 103112 Steppin Out Enrique Iglesias

On the Water: Enrique Iglesias and his girlfriend Anna Kournikova go for a boat ride in Miami on October 30.

6. 103112 Steppin Out Christina Milian

Showing Some Skin: Christina Milian exposes her black bra when arriving at a birthday party at Mr. Chow in Beverly Hills on October 30.

7. 103012 Steppin Out Demi Lovato

LAX Lovato: Demi Lovato in a red beanie tries to cover her face when walking through LAX Airport in Los Angeles on October 29.

8. 103012 Steppin Out Javier Bardem

Bardem's Bond Girl: Naomie Harris and Javier Bardem attend the Skyfall photocall in Madrid on October 29.

9. 103012 Steppin Out Jessica Alba

On the Phone: Jessica Alba helps present the Microsoft Windows Phone 8 in San Francisco on October 29. Check out her cute daughter Honor Warren on the screen.

10. 102912 Steppin Out La La Anthony

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.

11. 102912 Steppin Out Cameron Diaz

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.

12. 102912 Steppin Out Salma Hayek

Political Pals: Jada Pinkett Smith and Salma Hayek host a Victory for Obama Fundraiser at the Smith home in Los Angeles on October 25.

13. 102912 Steppin Out Zoe Saldana

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.

14. 102912 Steppin Out Christina Aguilera

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.