Well - that's mostly true. Of the scenes with her presence (trust me - that means *every* scene), half of them involved trying to look serious, pouting, and trying too hard, while the other half were in reality not as cringeworthy as would be expected. It was kinda fun trying to guess how bad she would be in the following scene.
Unfortunately, the fun stops there. That was the only unpredictable element of the movie. Hmm... I don't know about you, but to me, the word "alibi" conjures up images of deception, cool plot twists and surprise endings. And yet, "The Alibi" contains NONE of these things. To avoid ruining what little element of surprise there is in the movie, all I will say is this: it's obvious. No, really. In fact, it's even beyond the "too obvious" stage. Even if it were just "too obvious", there would always be the possibility of it not being true. Following me? In short, either this movie is trying to be extra-intelligent (and failing), or it is just a crap movie (more likely).
All in all, though, it isn't such a bad way to spend nearly two hours. The story has a small amount of originality and ingenuity. There are much better "wrong number movies" out there. At least at the end of it you will be able to say, "I knew that all along!"