Caroline Sieber

Although pajamas are a bedtime staple for most, gutsy celebs are showcasing how to style sophisticated sleepwear for daytime, as well as on the red carpet. Test-drive this trend for daytime — printed pajama topper and distressed denim — like Drew Barrymore, spice it up with heels like Rihanna in Pucci for an evening look, or go full throttle with a slimming silk set and matching sequin blazer like Elisa Sednaoui in Ferragamo for a fabulous cocktail party. Whichever look you choose, we can assure you that this trend's comfort and style will have you rethinking all of your chic sleepwear. Step inside to see who else has embraced the pajama trend and to shop the looks for yourself.

>> Slits, cut-outs, and head-to-toe print looks — courtesy of the Resort collections — all got major play this week. See who went there — and who got two nods apiece — in the slideshow.

>> On to the next: Not a week after Paris Fashion Week ended, fashion's attention has already been shifted to London, where the Frieze Art Fair gets under way today. Yesterday, designers Alber Elbaz and Phoebe Philo, art dealers Vladimir Restoin-Roitfeld and Philo's husband, Max Wigram, plus Natalia Vodianova, Caroline Sieber, and Valentino Garavani were all spotted taking in the wares at the VIP preview.

Yesterday, Karl Lagerfeld showed a beautiful Cruise 2012 collection on the French Riviera to an equally chic crowd. All of his muses were present: Alexa Chung, Blake Lively, Rachel Bilson, and Clemence Poesy, to name a few. They showed up in amazing Chanel looks, ranging from tweed short suits to floaty Spring-perfect dresses. Peruse the slideshow for the best ensembles of the evening, then tell us which look is your favorite!

>> Marc Jacobs has taken the stage for many a reason in the past — usually it involves accepting an award — but last night, it was to sing backup to Donna Summer at the opening of Louis Vuitton's new store on Bond Street in London. “It was fun — but I think I’ll stick to my day job,” he quipped.

Jacobs celebrated with the likes of Stella Tennant, Bernard Arnault, Carine Roitfeld, and Natalia Vodianova, and opened up about his recent hair transplant, which had him avoiding press and cameras at the Costume Institute Gala earlier this month. "I was starting to thin on top. I can’t dye it for a while, so this is my natural colour.”

He also hinted that the Louis Vuitton logo that he has helped make so ubiquitous almost got squelched way back when he first started at the brand: "When I arrived at Louis Vuitton 12 years ago, and I was figuring out how to create a new tier of Vuitton for a different customer, I thought it would be clever to hide that monogram, which was very stupid of me. That logo is part of what makes the Vuitton so desirable. It allows people to become members of an aspirational club."

Logos are to be expected, but not Louis Vuitton couture — Jacobs says he has no desire to launch such a collection. “Some of what we already do at ready-to-wear is pretty much at couture level, anyway."

Chanel hosted a dinner in New York last night at the Mark Hotel to celebrate Vanessa Paradis as the face of Chanel's newest beauty obsession, Rouge Coco de Chanel.

The guest of honor was joined by a stylish crowd gearing up for New York Fashion Week—Kate Bosworth, Daphne Guinness, Caroline Sieber (who arrived with a Chanel transfer tattoo on her upper arm), Terry Richardson, Amy Astley, Irina Lazareanu, and Edita Vilkeviciute to name but a few. Once inside Kate Bosworth and Daphne Guinness showed Derek Blasberg how to work a ballerina bun and the Chanel ambassadors posed for a group snapshot. More images from the Chanel dinner in the gallery below.

Source: Getty, WireImage