I posted awhile ago about Ms. Dushku and her possible ticklishness when her last movie Wrong Turn came out on DVD. In the movie she is tied up and you can see her armpits and in the commentary section she says something about the crew wanting to ticle her or something. I can't remember exactly, but I hope that sort of answers your question.
Please check out "Bring It On". There is some short Eliza foot exposure, besides which we get to see her do a variety of dancing and cheerleading. Lovely stuff. It's also quite a decent movie, in my opinion.
Sole Master, the shot of Dunst's and Dushku's feet are at the end of the movie in the closing credits in Bring It On. Also, if you want to see Dunst's feet for an entire movie, watch Crazy/Beautiful.
she is tickled on her sides in the more Soul Survivors. a little bit past the middle and then she and another girl get in the shower. but they both are still dressed.