Very much having to join the dots on this one in the absence of any concrete info, but the fact she's wrapped in a German flag seems a reliable indicator of nationality.
It sort of looks like there's football playing on the big screen, yer man sat to the right of her is wearing a shirt with Podolski written on it and there's a World Cup on. All solid fan park signals.
Of course the overwhelming German-ness of everything we've deduced so far does suggest that this might not be the freshest bit of viral content on the block, but you'd be a fool to quibble over dates when the public nudity's this damn strong...
Enjoy!