When In Rome (2010)

Genre: Comedy | Romance
Starring: Kristen Bell, Josh Duhamel, Danny DeVito, and Jon Heder

Plot:
Beth is a young, ambitious New Yorker who is completely unlucky in love. However, on a whirlwind trip to Rome, she impulsively steals some coins from a reputed fountain of love, and is then aggressively pursued by a band of suitors.

http://www.imdb.com/title/tt1185416/
http://en.wikipedia.org/wiki/When_in_Rome_(2010_film)