Selena Gomez - who is currently dating Canadian heartthrob Justin Bieber - appears in the romantic comedy in two roles, one of whom is a British heiress named Cordelia Winthrop Scott, and she admits she is concerned about the right tone of voice.
"I did about two weeks of training before the movie. It was fun, but I was very nervous."
Selena filmed next to the star Glee Corey Monteith and and beautiful Gossip Girl Leighton Meester, and revealed that they spent much time singing on the set.
"We sing a lot. We sing songs that are playing real well and we created our own letters, it was really fun."
Corey - who plays a football player and a truck driver in the movie - loved his time on set because of the "hot girls" and the opportunity to shoot in the French capital, Paris.
"Coming out with a bunch of hot chicks in Europe? Also want. It was fun, we were blown away by the time we shot in Paris, the Eiffel Tower."