Like us, Jimmy Kimmel has trouble telling "How is Paris Hilton on vacation different from Paris Hilton not on vacation?" since in either case she's prone to partying semi-scandalously. But in a zesty bit of late-night comedy, Jimmy was able to clearly differentiate between the hotel heiress's French Riviera frolicking and a typical American family on a vacation.
Can you guess who was diving off yachts and swilling Cristal in Saint-Tropez and who was sweltering in the backseat of a non-descript sedan? Check out Jimmy's vacation-snapshot comparison in the video above to validate your instincts.
See how other stars are simmering and summering in our Famous Families on Vacation gallery.