For those of you that want extra "K", I found 2 additional film credits for Ms Anderson: Trick 'r Treat (2007) and Blue (2016).
I saw
Trick or Treat and the scene with Tatiana is not worth it.
There is going to be a spoiler here
There is a girl who must find a boy for her "first time" She is looking around a outdoor Halloween celebration for someone and she sees a muscular back who she assumes is a well built man. She gets that "he has possibilities" smile on her face and Tatiana turns around and smiles at a guy whom we guess she was looking for. The girl who is looking for a boy, looks away from the couple with a embarrassed look on her face. It all takes about 3 seconds
BTW depending on where you live, the movie will be on AMC on the 24th around 3pm. If you like Halloween anthology movies (like Creepshow) it might be worth a look. But if you just want to see Tatiana, not so much.
Just found this, go on youtube and put in "Trick R Treat 2008 720p" (can't post the link) go to 32 minutes and you can see the scene. Thing is, the sound is weird, like really low and the video looks like it is on zoom. Someone getting around copyright I guess