I'm so excited, Selena's past albums have been amazing- so this is exciting

I, for one, am looking forward to seeing how they do together in a collaboration. For all you naysayers you need to think about something... that every performer has fans who love them and their performances and others who don't. To each his own preference but don't put down people simply because your taste runs to something different. I'd venture a guess that some of what you like is not music to my ears but I wouldn't dream of putting you or your choice down over it. If you don't like something don't watch or don't listen... instead find something else more to your liking. If you can't say something nice or uplifting it's best to say nothing at all. No one likes haters.