Strike a Pose11 Best Fashion InstagramsErin Cunningham08.24.13Strike a Pose11 Best Fashion InstagramsAnna Wintour makes her Instagram debut, Margherita Missoni lounges in the pool, and Bar Refaeli meets her number one fan. Plus, more of the week's best Instagrams.Erin Cunningham08.24.13 8:45 AM ETAnna Wintour makes her Instagram debut, Margherita Missoni lounges in the pool, and Bar Refaeli meets her number one fan. Plus, more of the week's best Instagrams. @christiebrinkleyChristie BrinkleyLike mother, like daughter. Supermodel Christie Brinkley poses with daughter Alexa Ray Joel while boating. "It's no fluke that we're having fun... Cause were together on the water," the model wrote. @gqGQ"Another trade show, another mermaid having her tank cleaned. Business as usual. #agenda," GQ magazine posts after casually encountering a mermaid. @voguemagazineVogueStop the presses, Anna Wintour has made her Instagram debut. The Vogue Editor-in-Chief was snapped by photographer Taylor Jewell with her signature sunglasses and bob, reading the magazine's September issue. "Anna Wintour reads #TheSeptemberIssue. Do you? We would love to see it! Show us your #voguestagram." The fashion world responded to Wintour's trend, with the likes of Oscar de la Renta, Reese Witherspoon, and Calvin Klein's Francisco Costa all showing off their #voguestagrams. @songofstyleAimee SongSong of Style blogger Aimee Song juxtaposes seriously stylish shoes in front of a seriously messy construction site. @lenadunhamLena DunhamLena Dunham continued her sometimes-passtime of posting outfit selfies this week. "So @white_lightning turned me on to Kate Spade Saturday," she wrote. "It's cute, fairly cheap and more my dress will match my shoes forevermore. Btw this aint's no sponsored 'gram. Can't even believe I have to sy that ut we are living in an age... #internetshopping #4lyfe." @crfashionbookCR Fashion BookCarine Roitfeld got an artistic, handwritten note from photographer Mario Sorrenti this week riddled with exclamation points. @rihannaRihannaWild child Rihanna shows off her stripes in a zebra-printed jumpsuit. The singer Instagrammed a photo of herself with a side-by-side of Zebra's saying "YAASSSS Rih! Work it! @janekeltnerdevJane Keltner de ValleMuppet invasion! Teen Vogue Senior Fashion News Director Jane Keltner de Valle found a new friend -- a furry Fendi keychain. She writes, "Who needs a guard dog when you've got #Fendi home security? #monstersinc" @houseofherreraCaroline Herrera"No truer words! Today's @nytimes #inspiredbyfashion.#woodyallen #bluejasmine," Carolina Herrera's team writes of Woody Allen's words on Cate Blanchett. @mmmargheritaMargherita MissoniSoon-to-be mom Margherita Missoni relaxes in a crystal blue pool while hanging in Valese: "#staycation #varesetheplacetobe #waitingforotto#stayathomevacation." @barrefaeliBar RefaeliIsraeli supermodel Bar Refaeli makes one of her major fan's dreams come true. She poses with Eyal Benaim, who is clearly really, really excited. (Even his Instagram is filled of countless photos of her.) "I ❤️you too," she wrote in response to his t-shirt.