Less than one month after entering rehab, reports claim that Whitney Houston is also suffering from emphysema.

In a story printed by the National Enquirer, a source revealed that the singer is in the beginning stages of the lung disease, and has been instructed by doctors to give up her smoking habit. "She's developed emphysema -- and her doctors are warning her she'll die a horrible death," a friend of Houston's told the paper.

The 47-year-old has been known to smoke cigarettes, a habit that has trickled down to her 18-year-old daughter Bobbi Kristina. Evidence of possible lung problems were brought to the forefront last year when Houston, while on tour, was unable to perform several of her hits without her voice cracking and becoming short of breath.

According to the Enquirer, Bobbi Kristina, who was allegedly in rehab for her own drug addiction, is said to be desperately trying to save her mother's life by getting her to stop smoking.

As previously reported, Houston enrolled in an outpatient rehab program in May. "Whitney voluntarily entered the program to support her long-standing recovery process," her rep, Kristen Foster confirmed to CNN.

Houston's battle with addiction became public during her marriage and subsequent divorce from husband Bobby Brown. She was also forced to postpone dates on the European leg of her Nothing But Love tour in order to focus on her sobriety.

Houston has yet to release a statement confirming or denying that she has emphysema.

Watch Whitney's 'Saving All My Love for You'
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