2/4 : AA - where did I go wrong?

No real reads on villians as I sat down fairly recently. The cold call on turn really had be worried.

Party Poker 2/4 Hold'em (9 handed) internettexasholdem.com (http://www.internettexasholdem.com)

Preflop: Hero is MP1 with A/images/graemlins/heart.gif, A/images/graemlins/diamond.gif.
UTG calls, UTG+1 calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">1 fold</font>, MP3 calls, <font color="#666666">1 fold</font>, Button calls $3.50 (All-In), SB calls, <font color="#666666">1 fold</font>, UTG calls, UTG+1 calls.

Flop: (12.75 SB) 5/images/graemlins/diamond.gif, 6/images/graemlins/spade.gif, 2/images/graemlins/diamond.gif <font color="#0000FF">(6 players, 1 all-in)</font>
<font color="#CC3333">SB bets</font>, UTG calls, UTG+1 calls, <font color="#CC3333">Hero raises</font>, MP3 calls, SB calls, UTG calls, UTG+1 calls.

Turn: (11.37 BB) 5/images/graemlins/heart.gif <font color="#0000FF">(6 players, 1 all-in)</font>
SB checks, <font color="#CC3333">UTG bets</font>, UTG+1 folds, <font color="#CC3333">Hero raises</font>, MP3 calls, SB folds, UTG calls.

River: (17.37 BB) Q/images/graemlins/club.gif <font color="#0000FF">(4 players, 1 all-in)</font>
<font color="#CC3333">UTG bets</font>, Hero calls, <font color="#CC3333">MP3 raises</font>, UTG calls, Hero calls.

Final Pot: 23.37 BB

[bisonbison]

This looks fine until the river, at which point I definitely call once and would call the second time feeling like it's a money-losing call.

[UCLAseetoK]

I think I take your line here. Really unsure in my mind about this one though, against a table of unknowns.

Looks fine, I guess.

I'd be hard pressed not to call that raise on the river, but it's probably smarter to dump it.

[Shilly]

I'm not really worried about MP3 on the turn--he could have lots of different overpairs, or possibly a flush draw. UTG's donkbet scares me though, as it's possible that he could have limped with A5, 66, 55, or 22. I doubt he's donkbetting a worse hand here (like overpairs or A6). I don't know if I'm good enough not to pay him off.

And MP3's action on the river either looks like a passively played QQ or a really slow-played 66.

[MrEngenic]

I played a very similar hand the other day and folded. Flop K44, turn 5 river Q. They had K5 and KQ so MHWG.

I like your line