By the 1950s, Holiday's drug abuse, drinking, and relations with abusive men led to deteriorating health. As evidenced by her later recordings, Holiday's voice coarsened and did not project the vibrancy it once had. However, she had retained — and, perhaps, strengthened — the emotional impact of her delivery. Body + Soul.
Billie Holiday
http://www.zshare.net/audio/1405489384a27d02/