I mean...yeah you can definitely enjoy this movie if you find it streaming on TV and there is nothing else to watch, but I wouldn't choose it over a re-run of The Hunger Games, Fast and Furious and other similar (popcorn movies).
Amanda Seyfried is a beautiful as she is on every movie, and does the best she can with the almost ridiculous and illogic script that was given to her.
On the other side, I keep wondering when am I going to watch a Justin Timberlake's movie in which he finally improves and stop trying to look "handsome" on every scene. You know what I mean, he does that stupid thing with his mouth, eyes and eyebrows, like on "Friend's with benefits" and "Bad teacher". Truth to be told, I understand this is a 2011 movie, so I hope whoever is deciding he is a good movie material, has had helped him improved on his acting.
Not regretting watching it, but I wouldn't waste my time on watching it a second time.