NL100 AK facing overbet shove on turn

[Hosehound25]

Villain is running at 47/22/3 over the session.

Ultimate Bet
No Limit Hold'em Cash Game
$0.50/$1.00 Blinds
6 Players - (LegoPoker Hand History Converter)

SB: $127.85
BB: $56.10
Hero (UTG): $143.35
MP: $74.25
CO: $159.70
BTN: $65.60

Preflop: Hero is dealt K[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/heart.gif[/img] (6 Players)
Hero raises to $3.50, MP folds, CO folds, BTN calls $3.50, SB folds, BB calls $2.50

Flop: ($11.00) 6[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/spade.gif[/img] (3 Players)
BB checks, Hero bets $10.00, BTN calls $10.00, BB folds

Turn: ($31.00) 9[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, BTN bets all-in for $52.10, [i]Hero???