Whitney Houston Suffering Serious Health Issues?

That's according to National Enquirer. They are reporting that Whitney is fighting for her life against deadly emphysema, a lung disease. Doctors have told the 47-year-old singer she’s suffering from the early stages of the disease and told her she must immediately quit smoking or she will die.

“She’s developed emphysema and her doctors are warning her she’ll die a horrible death,” a friend told The Enquirer exclusively.