There is a certain energy in that movie. Especially at the beginning when Cameron Diaz seems invincible she has the time of her life (almost literally). There is a great sequence where she kinda falls down though which sets of the rest of the movie. Unfortunately even though it does make sense for her character, it does loose quite a bit of its pace from that point on.
Justin Timberlake is good in playing kind of against character and does not care about what people may think. Jason Segel is almost underused in this one and even Cameron Diaz did not really have that many great moments overall. And for a movie that tries to stay raunchy, it does even fail at combining that with the funny elements. While deliciously evil at times (and good), it also misses the point half of the time. Not really bad, but not that good either (I only watched the cinema release and not the extended cut)
People's Choice Award Favorite Comedy Movie