Several Britney Spears fan sites have posted what they refer to as “the full tracklisting for her imminent Best Of album,” though the referenced source — either Launch.com or Launch UK — have no news which feature a track listing. It appears part of the story was lifted from a Launch UK/dotmusic article, but no track listings have been posted.
Update: Looks like the search feature at Launch UK didn’t show the latest Spears article, which does include a greatest hits tracklisting.
Update II: The story at uk.launch.yahoo.com has since been removed.