blahbrarian
One who has a huge amount of celebrity gossip stored in their brain for someone who never talks about it.

Opposite of a blahbarian.
Kelli:  OMG, did you hear about Brangelina's trip to Malawi?
Kate:  Malasia.  And yeah, but shut up.
Kelli: ...
Jane:  She knows, but doesn't care.  Don't mess with the blahbrarian.