Britney Plays Koi, Sees Thicke!

She may not have been smiling yesterday afternoon, but photogs caught a seemingly upbeat Britney having dinner at Koi last night!

And she certainly had something to smile about -- after dinner she went to the House of Blues to catch R&B sensation Robin Thicke!

We spied Halle Berry there too, celebrating her birthday!

Think there could be a Thicke collaboration in her future???