First Look: Selena Gomez, Leighton Meester & Katie Cassidy in "Monte Carlo" Trailer

On July 1, Katie Cassidy, Selena Gomez and Leighton Meester star in Monte Carlo, in which they play three young girls who embark on a dream trip to Paris.

A dream trip that turns into a nightmare. That is, until ...

When the trio decides to take a break from a lousy tour and sneak into the lobby of a 5-star hotel, one of the girls is mistaken for a famous British heiress.

Before they know it, the girls are living the A-list dream, donning haute couture, jet-setting and dodging celebrity gossip media with the best of them.

Watch the trailer for this fun-looking cheese-fest - in which Selena's new song "Who Says" just happens to be playing prominently - below!

Monte Carlo Trailer