@ IRENE46

And what you consider sounding "good" is not what I consider sounding good...I think we can agree on that :) I mean, you actually like Celine's nasality, Leona's tiny unsupported wobbly off pitch notes, and Christina's constant straining/screaming and general off key moments.
It's like this...you might like the sound of a piano over the sound of a cello, and that's fine, but what really counts if who plays the piano or the cello :) so yes...Christina has a stradivarius in her throat, but it is played by an amateur, while I have a humbler instrument, made by an unknown artisan, but it is played Paganini. Of course, that doesn't mean I have my own vocal flaws, but I am consciously working on improving them, I don't just make a loud noise expect to get praised for it :)

My theory as to why that voice teacher would not tell the truth about Christina's vocal flaws is simple...he is making a living by training pop singers, he doesn't want to get a nasty reputation with them. On the other hand, a vocal expert such as Dileesa Hunter has openly talked about Christina's vocal flaws and called it "basically just screaming and coughing".

And why would Jaroussky say it like it is? Because he is one of opera's top stars of today and he does not need to vow down to Christina or her stans, he is in a circle that depends on highly cultured people. That makes a huge difference.