Over the weekend stars were dressed for pre-holiday festivities, partying, shopping and traveling in the coolest of clothes.  California girl Gwen Stefani has certainly adapted to the British lifestyle.  The No Doubt singer looked smashing in lovely layers as she walked the streets of London.

PHOTOS: Gwen Stefani, Reese Witherspoon, Rachel McAdams, David Beckham, Zac Efron, Chloe Sevigny, Kate Gosselin, Kate Beckinsale, Krysten Witter, Leona Lewis, Kate Moss, Calista Flockhart, Cate Blanchett, Katy Perry And Russell Brand In The Best Of Pre-Holiday Dressing

Krysten Ritter celebrated her belated birthday in Las Vegas looking sharp in a blue and black romper.

PHOTOS: Worst Of Pre-Holiday Dressing

Who else stayed warm in style?  Check out the gallery to find out!

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• Calista Flockhart
• Cate Blanchett
• Chloe Sevigny
• David Beckham
• Gwen Stefani
• Kate Beckinsale
• Kate Gosselin
• Kate Moss
• Katy Perry
• Krysten Witter
• Leona Lewis
• Rachel McAdams
• RadarOnline
• Reese Witherspoon
• RussellBrand
• style
• Zac Efron

At The Gotham Independent Film Awards In New York City, stars showed off the latest trends, decked out in sequins, big bows and bold colors. Natalie Portman, who received a career tribute at the Cipriani Wall Street event, sparkled in a Proenza Schouler tank dress and luxurious jewelry from Kwiat.

PHOTOS: See Natalie Portman, Kristen Wiig, Brooke Shields, Ryan Reynolds, Krysten Witter And Alec Baldwin Get Trendy For Gotham

Kristen Wiig had a style score in Stella McCartney, and ruined it by wearing shocking tights. What color were they? Check out the gallery in Style to find out...

PHOTOS: See Natalie Stun In Jason Wu At The Brothers Premiere In New York

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• Alec Baldwin
• Brooke Shields
• Cipriani Wall Street
• Kristen Wiig
• Krysten Witter
• Natalie Portman
• Proenza Schouler
• Ryan Reynolds
• Stella McCartney
• The Gotham Independent Film Awards