I loved that she seemed to have fun. She looked so nervous in the beginning (I wonder if anyone told her anecdotes of how cruel the audience at Viña can be when they don't enjoy a performance), but by the time she went into Genie she was already in her element.
A few of my thoughts about the setlist:
Opening with Dirrty is fine, that shit was HUGE in Latin America, unlike the US. But either Bionic or Vanity should be dropped, or they both could be shortened. Just do a verse and a chorus for each, there's no need to drag them for so long especially when they're not her most famous songs.
Genie in a bottle was fine, people loved it, but she could have her background singers do one chorus in Spanish. Especially since she's already doing a latin pop remix! They could just play a pre-recorded chorus of Genio Atrapado and have her do choreo and the final riffs to it. Ya Llegué as an intro is fine, expected. But she should put a bit more energy to Santo. And I would scrap What A Girl Wants and replace it with Ven Conmigo. If Santo gets sandwiched between Genio Atrapado and Ven Conmigo, people will remember it more kindly. Her Spanish setlist is pretty much complete with Pero Me Acuerdo De Ti and Falsas Esperanzas, I don't need Contigo En La Distancia. It's not even her song, so it's fine if she wants to skip it. Plus, it's really demanding for a one-hour live set. And I don't know why so many people are complaining about Feel This Moment. That song was big in Latin America, and Pitbull is very popular too. I would drop Desnudate, though, because nobody cares about it.
Having her background singers do Show Me How You Burlesque was weird as fuck. That shit should have been much shorter if she wasn't gonna show on stage. But the transition from Express to Lady Marmalade was fun. The outfits were NOT right for it, though - If she adds a lot more feathers, rhinestones and razzle dazzle, it would be a lot better.
I never really liked Let There Be Love as a closing number, but I dislike it even more for a Latin American concert, because it's so random. Beautiful + Fighter is an absolutely perfect combo to end a concert with.