What an amazing talent. What a powerful voice. Many singers tried to emulate her, but to no avail. The original was infinitely better. The Moon/Jupiter conjunction in Aries close to the 2nd house cusp and trine the Sun in Leo were responsible for those immensely powerful vocals that gave you chills. Saturn, however, was waiting round the corner.
Whitney had a very powerful opposition between the Sun in Leo and Saturn in Aquarius, a battle between two giants, as Robert Hand describes it. The opposition was mutually applying as Saturn was retrograde. At the moment of death, the opposition had become partile and very close to exact, meaning that there was heavy pressure on her Sun and had she escaped death, the pressure would still have been there for some time to come. The Sun's conjunction with Venus, the 8th house ruler, was also something to worry about.
Saturn was of course transiting her 8th house in Libra, but this doesn't say much by itself. Her Solar Return chart however, had Libra on the Ascendant, her 8th house sign, and Saturn naturally, was conjunct the Libra Ascendant. The Sun was also closely conjunct Venus, repeating the natal pattern and with Taurus on the 8th house cusp, Venus was both ruler of the Ascendant and the 8th house, linking the body with death. Not to mention the natal Ascendant ruler, Jupiter, conjunct the SR 8th house cusp.
The Lunar Return of this month repeated the Solar Return pattern. Libra on the Ascendant and Saturn, of course, conjunct the Ascendant. This was too much Saturn and combined with the progressed Sun/Saturn opposition, it proved too much for her to handle.
Saturn may have succeeded in eclipsing Whitney's light, but he was unable to prevent it from shining while she was alive. As long as videos like the one below are available, Whitney will always emerge as the winner.