Katie Cassidy, Selena Gomez and Leighton Meester in Monte Carlo.

Monte Carlo Movie Synopsis: Based on the Jules Bass book Headhunters published in 2001, Monte Carlo finds Selena Gomez playing a teen named Grace who's mistaken for a socialite while on a trip to Paris. Flying off to Monte Carlo for a charity ball and auction, Grace and her friends find themselves involved in the search for a million dollar necklace that goes missing.