"Was that the same backing singer who made some snide-sounding remark about people's talent being in inverse proportion to their egos?"

The one who was continually mugging away and trying to draw extra attention to herself had sung with The Rolling Stones and other mega-stars so I guess she thought she was something. But the remark about inverse proportion was okay - just open to misinterpretation. What she meant was that everyone was very talented and everyone was ego-less. At least that's how it came across to me.