After spending a decade fucking the Stones and doing heroin, her voice dropped the teeniest bit from when she sang "as tears go by"
Ya,it was a live performance on that vid,the studio version is better for obvious reasons. It's an old song though from early 80's maybe late 70's you just didnt hear that sort of stuff back then.
Surprising she survived all that,must share common genes with Kieth and Ozzie!