I loved the title of the post! haha. Well, I personally think this particular use of the hook was waaaay too obvious. Specially coming from a latinamerican background, it seems evident to me that Shakira and her producers knew the effect the song would have and the way in which nostalgia would play a big role in the song's possible success. And they were right. What I fail to comprehend is why they didn't stop to think that the way they were appealing to the public witht he use of the hook would be considered plagiarism. I'm torn. I think it kinda is? Because I have not read about her admitting that she used the exact same melodic phrase of Jerry Rivera's... and let's face it, it's a very characteristic melody to be confused with something else (or to be "invented" in the exact same way/sound by someone else). On the other hand, if this had happened let's say 20 years ago, the discussion about copyright would be completely different...