AA hand, was i right to 3 bet the river?

Villian was LAG preflop and passive post flop. 54/36/0.67 (after 31 hands)
Other person in hand was new player.

Dont know how to use bisonbisons converter just yet (first time on here, will toy around with it later, i promise)

***** Hand History for Game 2882572286 *****
$2/$4 Texas Hold'em - Saturday, October 15, 20:03:51 EDT 2005
Table Table 67961 (Real Money)
Seat 3 is the button
Total number of players : 10
Seat 3: quincy31 ( $129.98 )
Seat 7: kevin1499 ( $110.26 )
Seat 8: tomco333 ( $140 )
Seat 10: nattyice1 ( $24 )
Seat 2: rylpt ( $128 )
Seat 1: tle63 ( $82.50 )
Seat 4: DeadMoney036 ( $95.50 )
Seat 6: JammySmears ( $105 )
Seat 5: mcdonsc ( $290.36 )
Seat 9: Nuts2River ( $48 )
DeadMoney036 posts small blind [$1].
mcdonsc posts big blind [$2].
** Dealing down cards **
Dealt to nattyice1 [ Ac Ad ]
JammySmears folds.
kevin1499 folds.
tomco333 calls [$2].
Nuts2River raises [$4].
nattyice1 raises [$6].
tle63 folds.
rylpt folds.
quincy31 folds.
DeadMoney036 folds.
mcdonsc folds.
tomco333 calls [$4].
Nuts2River calls [$2].
** Dealing Flop ** [ 2d, 8s, Jh ]
tomco333 checks.
Nuts2River checks.
nattyice1 bets [$2].
tomco333 calls [$2].
Nuts2River calls [$2].
** Dealing Turn ** [ 7s ]
tomco333 checks.
Nuts2River checks.
nattyice1 bets [$4].
tomco333 calls [$4].
Nuts2River folds.
** Dealing River ** [ As ]
tomco333 checks.
nattyice1 bets [$4].
tomco333 raises [$8].
nattyice1 is all-In.
tomco333 calls [$4].

Final pot 56.50.

Yes.

But, as you already know, learn to use a converter before posting again.