Adapted from Jules Bass' novel "Headhunters," "Monte Carlo" leans hard in the early going on tiresome bickering between Meg and Emma, characters in their early 20s, while Gomez's 18-year-old Grace keeps the peace even as their package tour starts feeling like a chore. Then, bigger complications: The threesome gets separated from the group after an Eiffel Tower visit. And Grace is mistaken for a snotty British socialite (also played by Gomez), for whom she is a dead ringer.
Then it's off to Monte Carlo on the socialite ruse for boys, boys, boys. Emma falls in with a louche playboy, but her heart yearns for her Texas sweetheart (Cory Monteith). Meg, still grieving the death of her mother, finds a sunny Australian (Luke Bracey) to improve her outlook. Grace fakes her way through polo matches and deals with her attraction to a French boy (Pierre Boulanger). Disguises, deceptions — you could call the narrative of "Monte Carlo" Shakespearean, but I prefer to consider Shakespeare's romantic comedies as "Selena Gomez-esque."