Cameron Diaz and Ashton Kutcher stated in a post-production interview that they were actually drunk during the wedding scene in order to make it look realistic and their erratic behavior caused the scene to be filmed multiple times. A video of the outtakes was available online, but Fox blocked it due to copyright infringement.
Joy's party trick was performed by Cameron Diaz in another movie - Charlie et ses drôles de dames se déchaînent (2003) during the recovery of the Halo rings.
According to Rob Corddry, Ashton Kutcher slapped him in the face during his audition even though it was not scripted.
The lobby of their hotel is the Planet Hollywood Resort & Casino. The view from their room places them in the northern most part of the building with a view of the Paris and Caesars Palace.
In the UK and Australia, the DVD was the first film to include a Digital Copy with it.