Best Dressed: Christina Aguilera's a Mod, Mod Girl

1. 100308 Best Dressed Christina Aguilera

Christina Aguilera switches up her porn star tendencies for mod-inspired, understated elegance at Rock the Vote in Hollywood. We approve!

2. 100308 Best Dressed Jennifer Lopez

La Lopez sparkles in gunmetal metallics at the Dolmenico Dolce party in Milan.

3. 100308 Best Dressed Camila Alves

Camila Alves steals the show at the Dolmenico Dolce party in a quasi-bridal strapless gown and one killer accessory: her handsome beau, Matthew McConaughey.

4. 100308 Best Dressed Cameron Diaz

With strappy red heels, Cameron Diaz breathes new life into the classic jeans and white shirt look at AFI's Night at the Movies event in Hollywood.

5. 100308 Best Dressed Rita Moreno

Screen legend Rita Moreno is just as lovely as ever in canary yellow at AFI Night in Hollywood.

6. 100308 Best Dressed Fergie

Fergie Ferg puts a waist on her voluminous, plum-colored top by smartly cinching it with a sassy belt in Las Vegas.

7. 100308 Best Dressed Ana Ortiz

The ever-fashionable Ana Ortiz works a black satin pencil skirt with finesse at the Women Empowering Women in Fashion, Media, and Music Gala in New York.

8. 100308 Best Dressed Julissa Bermudez

Julissa Bermudez works her cut-out booties to the max by pairing with a splashy strapless dress in neon colors at a Patrón party in NYC.

9. 100308 Best Dressed Salma Hayek

Behold a rare misstep from Salma Hayek, who overdoes it with a head-to-toe black ensemble at the Balenciaga Spring '09 fashion show in Paris. Didn't she hear: black is not the new black!

10. 100308 Best Dressed Zoe Saldana

Zoe Saldana puts an ingénue twist on a ladies-who-lunch style suit at Christian Dior in Paris. Very proper!