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.

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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:

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