The girl that Hayden kissed might not have been Elisabetta (sp?) but Araba Dell'utri, an Italian socialite.
Here's a pic of her from another board I lurk at for the pictures. An N'Sync board, and the picture was posted by Valkeeria.
Another pic of Araba wearing the same neckless that she wore in the picture with Hayden.
Credit: ISM Database. I would link there but there are topless photos of hers on that website.