Social Scene: Week of December 19

This week, celebrity activity on Instagram was overshadowed by Blac Chyna and Rob Kardashian's ongoing battle on the social media platform, which documented every move of their contentious (and confusing) breakup on Saturday and Sunday ... and Monday.

Elsewhere, Andy Cohen braved the cold in NYC and hung out with Mariah Carey on the Bravo Clubhouse, while Bella Hadid took a sexy selfie and hung out with Keke Palmer.

SEE ALSO: Candice Swanepoel shares intimate breastfeeding pic, speaks out against being publicly shamed for it

Nicki Minaj, Britney Spears and Beyoncé all showed some major skin on their respective Instagram accounts, too. Serena Williams debuted her brand new racket and issued an implicit warning to her tennis competition, and Demi Lovato hung out with Joe and Nick Jonas in NYC.

Check out the best celebrity Instagrams of the past week below:

21 PHOTOS
Social Scene: Week of December 19
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Social Scene: Week of December 19
Having a moment with @bravoandy tonight on @bravowwhl. 11/10c
Third year together for my bday @marianne_fonseca @haileybaldwin 📸 by @AricLaferriere
Bad gyal forward. Bad gyal PULL UP!
Crazy cold in NYC this morning - above ground below ground and everywhere else!!! See you on @RadioAndySXM from 10-12. BRRRRRRR ⛈❄️💨💨
’Tis the season for tacky holiday sweaters and doing little things for others! #GiveExtragetextra #sponsored
#KekeDoesPaper 👸🏾
Love my new Blade racket, can't wait to compete with it! @wilsontennis
2001/2016 I love that we almost always stand on the same side of each other. Also, can I just say-we aren't at a costume party in 2001. That's legit how we were dressed for a regular night out. I guess I really was my character from Cougartown? And thank God my eyebrows grew back.
Good morning! May you all have a blessed day 😊
❤️💚❤️💚YUP! ❤️💚❤️💚
The crazy ⚡️energy ⚡️of my German fam got me like... 😆😆😆! #thevoiceofgermany
I'm restocking @thekylieshop tomorrow at 10am pst on KylieJennerShop.com! limited quantities on all products & merch! See you there 💋
Had a wonderful afternoon w the fam @baby2baby holiday party! I'm so honored to be part of such an amazing organization. #baby2baby #baby2babyholidayparty
Always love a night with my sweet friend @jenatkinhair #girlfriendsarethebestfriends #dinnerparty #holidaze xoRZ
Fast and furious.
What a joy! Would do anything for this woman. Love you so and thank you for inviting me on your show 💃@ChelseaHandler @ChelseaShow #Netflix #OnNow #StreamingNow
The Crew
Face beat by me 😌💁🏻
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More from AOL.com:
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