It's still playing in only 683 3-D-equipped theaters, but Hannah Montana/Miley Cyrus: Best of Both Worlds Concert Tour could still give the latest newcomers a run for the money in its second week. Few box-office forecasters are hazarding a prediction on how well the movie will do. "There's really no precedent for the pic," commented Daily Variety, presumably meaning that no other 3-D concert film with a huge tween fan base -- many of whom have already seen the film several times since it opened last week -- has ever hit theaters before. It also has no direct challenge. Without Hannah in the picture, the most likely winner would have been the romantic adventure flick Fool's Gold, starring Matthew Mcconaughey and Kate Hudson, which is opening in 3,125 theaters a week ahead of Valentine's Day (but is receiving an arrow through the heart from critics). It's expected to earn $19-23 million. Another strong challenge is expected to come from Welcome Home, Roscoe Jenkins, starring Martin Lawrence. Also opening in limited release is the Sundance Film Festival favorite In Bruges.