STRIKE A POSE11 Best Fashion Instagrams10.27.12STRIKE A POSE11 Best Fashion InstagramsGQ gets ghostly for H&M, Lady Gaga hangs with Donatella Versace, and more of the week’s top social snaps.10.27.12 8:45 AM ETLady Gaga hangs with Donatella Versace, model Cara Delavigne makes a funny face, GQ gets ghostly for an H&M bash, and more of the top social-media snaps from this week. By Anna Klassen Instagram / @Joan_RiversJoan Rivers“And here’s the inside of my bow coat on the stage tonight at Royal Albert Hall!” wrote Joan Rivers of this picture of herself on tour. The legendary comic took to the stage for her U.K. tour and showed the London audience just how much she loves their country—by donning an oversize British cape. Instagram / @Zac_PosenZac PosenLooking like a hot-pink flamingo/lobster hybrid, model Crystel Renn stands with designer Zac Posen for a quick snapshot. Posen captioned the pic: “In the studio last night before she headed off to her event!!” Instagram / @maisonvalentino Valentino“Congratulations to @sushidetortilla, the winner of the #MyValentinaNights Instagram competition,” wrote Valentino of the picture that took the prize. The contest asked Instagrammers to snap a photo of a city at night, in the “spirit of Valentino.” First prize is a trip to Rome—not too shabby for a single snapshot via iPhone! Instagram / @derekblasberg Derek BlasbergCelebrity photographer Derek Blasberg snapped a photo of a very pregnant Gisele Bündchen and wrote, “THAT pregnant and THAT gorgeous: Making peace with Gisele last night in Boston.” The Brazilian supermodel graced the November cover of Harper’s Bazaar Brazil to celebrate the magazine’s one-year anniversary. Instagram / @barrefaeli Bar Refaeli “Break time!” wrote model Bar Refaeli of this pic, which she posted on her Instagram account. The swimsuit model attended a Versace party earlier this week, looking fierce in head-to-toe black leather. Instagram / @brian_atwoodBrian AtwoodDesigner Brian Atwood uploaded a particularly naughty glimpse of his latest campaign, proving that shoulder accessories can do more than hold your lipstick and mints. Instagram / @gqGQAn H&M launch event brought out more than a gaggle of celebrities. Rising to the occasion, ghosts, goblins, and who-knows-whats adorned the party halls of the retailer’s launch. GQ snapped this photo of a shirt-filled graveyard and wrote, “Spoooooky.” Instagram / @ldnfashionLDN FashionLDN Fashion uploaded this snapshot of the always gorgeous and sometimes silly Cara Delavigne. The runway model can be seen as a lust-worthy young lady in the latest film adaptation of Anna Karenina, out this November. Instagram / @genevieve_jones Genevieve Jones Apparently the word “swag” isn’t reserved solely for Justin Bieber hits. “Chillin’ With My Homies @elizabeth_lg & KW #swag,” wrote Genevieve Jones of this photo of herself hanging out with some famous faces. Instagram / @harleyvnewton Harley Viera-NewtonTo celebrate the launch of a new store, Donatella Versace threw a party for all her biggest fans and celebrity pals. “Hanging with friends @LadyGaga @Donatella,” wrote one such pal, Harley Viera-Newton, of this snapshot of the threesome. Instagram / @bfa_nycBilly Farrell AgencyLooking downright show-stopping in a sheer black top with sequined choker, ebony skirt, and neon-orange cape, Jennifer Hudson looked bold and beyond beautiful at the Versace launch party earlier this week. “Gorgeous @IAMJHUD dressed to the NINES at the @Versace SoHo opening cocktail celebration,” wrote the photo agency of this photo.