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!

• TAGS

• Style
• Best And Worst
• 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