In the following video performance of Whitney Houston, she struggles to find a note, any note, let alone her prior four-octave voice. The band, backup singers and special effects can't mask the evident issues. At the end of the clip, you can see some Australian attendees walking out. It's sad. http://www.rnbmusicblog.com/fans-walk-out-on-whitney-houston-concert/10912/ Apparently you can't inhale drugs for years and expect to maintain healthy throat and lungs. Gives new meaning to "Waiting to Exhale." With multiple careers, perhaps she can land an acting gig. What a loss. Yet, the concert tour continues.