Park City, Utah

The audience ballots are still being filled out for the features in competition at the Sundance Film Festival, but in terms of cumulative audience applause, the winner is clear.

Edina native Annie Sundberg and her producing-directing partner Ricki Stern are the creators of several Sundance features, including 2007's "The Devil Came in Horseback" and 2010's "Joan Rivers: A Piece of Work." This year they're highly visible as the creators of the short tribute film thanking the 2,300 unpaid workers who keep the festival running.

The film, which debuted on Volunteer Appreciation Day, Jan 22, shows before every public screening and invariably triggers a rousing ovation. The punchy preview shows staffers of all ages and backgrounds getting footloose on Park City's Main Street, inside cinema venues, and in their hotel rooms, to Lady Gaga's "Just Dance." Also showing off their "Sun Dance" stomp are festival alumni Glenn Close, Sam Rockwell, Alan Cumming and Rachel Drash.