Pulling my hair out w/ KK preflop, call or fold?

Villain is 20/9/0 over 54 hands. Didn't see him do anything totally funky before...he seems fairly ABC. So is this AA? Could he possibly do that w/ QQ, AK?

Party Poker (10 handed)

Preflop: Hero is BB with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img].
>> converter is not working properly <<
MP3 raises to $2
LP1 calls $2
LP2 calls $2
folds to Hero who raises to $12.
MP3 reraises allin ~$54
folds to me
Hero? (I have him covered)