
Karlie Kloss does TRX in Sao Paolo, Coco Rocha balls so hard, and Alexa Chung beams as a proud author. Plus, more of this week's best Instagrams.
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"Like a boss," is what the caption reads. In plaid pants and silver stilettos, Coco Rocha balls so hard.

The hot sister trio Haim performed at the Chloé party in LA and “set the night on fire.” Aren’t they just the coolest?
@chloe/Instagram
Marie Claire acceessories editor Kyle Anderson tells it like it is: "Take a chill pill." When it comes to Louboutin pill-popping, we're sure to become addicts.
@kyleeditor/Instagram
Nothing feels better than penning a book and having it published, except maybe seeing it appear on a billboard in Times Square. A blissful Alexa Chung looks relieved and overcome with joy as her book IT shines in bright lights behind her. #Fame.

This is evidently what happens to hair when one "kicks a hornet's nest." John Jannuzzi of Lucky magazine gets into the Halloween spirit, showing off Editor in Chief Eva Chen as Lisbeth Salander of the Stieg Laarson series.
@johnjannuzzi/Instagram
Fashon or comfort? The Big Bird shoe shows us that these aren't mutually exclusive. We'll take fluffy!
@sheenasmith/Instagram
Karlie knows best! When it comes to working out, why go for a sweaty, dungeon-like gym when you can exercise with a delightful view? The supermodel does an intense TRX session as she looks out over the city of Sao Paolo.
@karliekloss/Instagram
Annabelle Dexter-Jones, rising actor and designer, misses her night as Marilyn. "It's disturbing that when I woke up I no longer looked like this... #posthalloweenemptiness." Nothing lasts forever, Annabelle.
@abanel/Instagram
Little NBA nugget. Margherita Missoni puts on a pair of NBA socks on her newborn, Otto, to "teach her son the importance of American athletics." Will he be the next Kobe? Jordan? He has big socks to fill.

...And then all of our jaws dropped. ADR is shocking on the regular with her outlandish outfits, so why did we expect anything less from this fashion all-star on Halloween? One strange bird, that Dello Russo.
@anna_dello_russo/Instagram
Silly girls. As the caption reads, “This is what happens when you put @manrepeller, @evachen212 and @intothegloss in one room.” Now we know.
@luckymagazine/Instagram