KK on Q-hi board: Take this to Value Town?

[MandM_WSU]

No major read on Villain. Table is fairly loose (75% to the flop when I sat down).

PokerStars 0.02/0.04 Hold'em (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is BB with K[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/heart.gif[/img].
UTG calls, <font color="#666666">1 fold</font>, <font color="#CC3333">MP1 :#A500AF(Villain)/ raises</font>, <font color="#666666">2 folds</font>, CO calls, <font color="#666666">1 fold</font>, SB calls, <font color="#CC3333">Hero 3-bets</font>, UTG calls, MP1 :#A500AF(Villain)/ calls, CO calls, SB calls.

Flop: (15 SB) 4[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, UTG calls, <font color="#CC3333">Villain raises</font>, CO calls, SB folds, <font color="#CC3333">Hero 3-bets</font>, UTG calls, <font color="#CC3333">Villain caps</font>, CO calls, Hero calls, UTG calls.

Turn: (15.50 BB) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, UTG checks, <font color="#CC3333">Villain bets</font>, CO calls, Hero calls, UTG calls.

River: (19.50 BB) 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, UTG checks, <font color="#CC3333">Villain bets</font>, CO calls, Hero ??? [img]/images/graemlins/confused.gif[/img]

I'm fairly certain Villain isn't raising in EP with a 5. I fear QQ, but if he has AQ, should I be check-raising this river?