It doesn't happen to you
You are not going to be fired by your father, if you are working for him or going to be dumped by your boyfriend, after you organize a surprise birthday party for him, especially more so...if you are Cameron Diaz. However, even more unlikely is...when you go to Vegas to cool off with your best buddies, you win a jackpot. In the movie, these incidents happen to Joey (Cameron Diaz) and Jack (Ashton Kutcher) and they also get married in inebriated condition to realize their folly next morning. However to get hold of the money, they play all kinds of games and go through different kinds of experiences, only to realize they need more than the money. They need the real thing. Some jokes and laughs keep the boredom away. More expected than unexpected plot. Nothing out of ordinary fare.
OK-Ttimepass movie and not to be confused anyhow with reality. Watch, if you liked 'Men are from Mars, Women are from Venus' genre of movies.