Dark Side of the Moon...who was the female vocalist on 'The Great Gig in the Sky' ?

Answer 1

It was Claire Torrie, she sued Pink Floyd not too long ago over royalties concerning that vocal. She ad- libbed the vocal and got it in one take. She said that she just tried to sing what it would like to be dying and the Floyd loved it.

Answer 2

Clare Torry: sure she sued, but here's more: Clare Torry's vocals

In an interview, [1], Clare mentioned that she was trying to emulate an instrument. So it was, from all published accounts, an improvisation with Clare apparently using her songwriting skills to give it form and function.

In fact, she mentions in her interview that she was never clearly told that the song was about death. In a different interview on the DVD "The Dark Side of the Moon" (Eagle Vision EV 30042-9 US NTSC version), Richard Wright mentions that she began singing words and they knew they didn't want that. Published interviews mention that she recorded the takes very quickly - on the DVD, the track sheet shows four tracks used for her vocals.

In her interview, she mentions that an accountant at Abbey Road called her; other interviews with band members mentioned that Alan Parsons suggested her

Here are links:

Answer 3

I think it was Toni Tennile.