Much better than "Glitter", "From Justin to Kelly" and "Crossroads"
I would say it's even better than "The Bodyguard", and it seems like I am not alone in that one (6.1 vs 6.4 on IMDB).
I am not a fan of neither of these ladies but Christina did a great job for what it was. I hesitated at first because I thought this would be a disaster à la "Glitter" but when I read the positive reviews from the people on Netflix, I gave it a chance and I was pleased to see how enjoyable this is.
It seems like I am not alone, though, its rating here is fairly high for a pop star vehicle (far away from the Bottom 100, where Glitter and From Justin to Kelly are - and rightfully so!-).