Timberlake Doesn't Like 'em Over 21

4/13/2009 10:15 AM PDT BY TMZ STAFF
Now we know why Justin Timberlake flew Southwest to Vegas -- so he could have more money to throw down on the blackjack tables once he got there!

Justin Timberlake: Click to watch
JT was spotted at the Hard Rock's Peacock Lounge this weekend, at the casino's VIP tables. He may not fly first class -- but he sure gambles that way.