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A post shared by Britney Spears (@britneyspears) on



Britney Spears is back to posting on Instagram and when she does this, it always makes us worry ...

Like why post this video above? Does it prove she posts her own videos? I guess ... but I don't think that's the really question here ... the question is ARE YOU OKAY, BRITNEY? Just because a person can manage their own Instagram account doesn't mean he/she is of sound mind and body.

Clearly her body's fine -- Brit's been posting bikini pix and workout videos -- but her mind? We just hope she's okay!