AQo versus late position overbet push at limper from ComeOnPhish

[betgo]

Poker Stars
No Limit Holdem Tournament
Blinds: t400/t800
(Ante: t75)
9 players
Converter

Stack sizes:
UTG: t30325
UTG+1: t68382
MP1: t27662
MP2: t36675
MP3: t27980
CO: t15310
Button: t21395
Hero: t32440
BB: t13869

Pre-flop: (9 players) Hero is SB with A[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/heart.gif[/img]
4 folds, MP3 calls t800 <font color="aaaaaa">(pot was t1875)</font>, <font color="#cc0000">CO raises all-in t15235</font>, Button folds, Hero ???