Q What do you get when you cross a movie like “Three Coins in a Fountain” with all those “Gidget” flicks?

A “When in Rome.”

Everyone knows the myth, that you’ll find love when you toss coins into Trevi Fountain in Rome. But what Beth (Kristen Bell) doesn’t know is that taking a coin or two out of the fountain causes the people to whom they belonged to fall for you.

Thus our heroine has a gaggle of love-struck guys chasing her around the Eternal City and back to New York, their hearts aflutter.

One of them happens to be Nick (Josh Duhamel), a handsome guest at her sister’s wedding in Rome. Others include a self-absorbed male model with six-pack abs, a love-smitten street magician, and a gaa-gaa Italian artist. Even her dentist shows up.

This is quite a windfall for Beth, a pretty blonde who has always been unlucky in love.

Bell is an up-and-comer, recently seen as one of the wives in “Couples Retreat” and as the self-absorbed title character in “Forgetting Sarah Marshall.”

Duhamel is familiar to TV viewers as the hunky casino security guy on “Las Vegas.” And the gung-ho major in the “Transformer” action movies. Music fans know he’s married to Fergie, sexy lead singer of the Black Eyed Peas.

Look for a few other nice-to-see faces. Don Johnson as the girl’s dad. Anjelica Huston as her boss. Danny DeVitto in a cute cameo.

The romantic comedy “When in Rome” is currently playing at Greenville Grande and Carmike 12.

Don’t confuse this “When in Rome” with previous movies of the same name — the 1952 Van Johnson mistaken-identity comedy or the 2002 Olsen twins direct-to-video teen-mishap comedy. Different movies, different plots.

This “When In Rome” is one of those lighthearted romantic comedies that — a recent trend? — seem to take their name from a city’s slogan. You know, “When in Rome do as the Romans do.” Another example would be that silly Ashton Kutcher-Cameron Diaz comedy, “What Happens in Vegas.” What next? A road-trip movie called “Virginia Is for Lovers” or a romantic romp called “It’s Better in the Bahamas”?

Travelogue meets Hollywood.

Shirrel Rhoades is a media/marketing consultant based in Key West, Fla. Contact him at srhoades@aol.com.