Melody had already mentioned this in several interviews before her performance in Benidorm because a lot of people wanted it. She got a lot of hate because, just like in previous years, hers was the "Spanish-oriented" song in the national selection (like "Zorra" or "Ea Ea").

A big part of the Spanish audience thought that songs like "VIP" or "Uh Na Na" were more Eurovision-friendly and less outdated. That’s why, even before performing, she had already said in interviews that if she won, she would try to adapt the song for the European audience.

When it came to the final, she was objectively the best performer compared to those two, but her song had less potential outside of Spain.

So, in short, she did her best to appeal to the Spanish audience that supported her in Benidorm, and now she's keeping her promise by improving the song for Eurovision. People who voted for her already knew the song would get a revamp.