Remember, you must be a registered user of TheInsider.com to participate. After you have CLICKED THROUGH THIS GALLERY and looked through the photographic evidence, leave your comments and best guess. Tune in Thursday to "The Insider" on TV, and your name could be called out on the air -- but only if you guess who this undercover movie actress is!
Watch our video to find out which Insider.com user got the challenge correct from Tuesday's mystery sighting!
Today's photo hint: This talented beauty has worked with Orlando Bloom, Brad Pitt and Jim Carrey.





Heather Locklear
Marcia Cross
Lisa Rinna
Kristin Davis
Kelly Rutherford
Alyssa Milano
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