The duo has been shopping in Venice, attending movie premiers and also doing a bit of business here and there during the trip which they seem to be thorougly enjoying. Hilton launched a clothing line at a Budapest store, which was so popular among the Hungarian people that the store's first order sold out immediately and they've already re-ordered, reported Radar Online.

The 28-year-old hotel heiress and her boyfriend attended the Venice Film Festival premiere of 'Bad Lieutenant: Port of Call New Orleans' starring Nicolas Cage and Eva Mendez on Friday night.  "We are having such a lovely time. Venice is such a beautiful city and the shopping is amazing," said Hilton.

"Doug whipped out his black Amex card and took Paris on a major shopping spree. They went to Cartier where he bought her the entire diamond Panther collection of rings, necklaces, and bracelets," said an eye-witness.