Q: Context: "The Great Gig in the Sky" is the fifth track on The Dark Side of the Moon, the 1973 album by the English progressive rock band Pink Floyd. The song features music by Richard Wright and non-lexical vocals by Clare Torry.

Question: who sang on pink floyd great gig in the sky? Let's give stream of consciousness first:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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To answer this question, we should know that: The song features music by Richard Wright and non-lexical vocals by Clare Torry. Therefore, the final answer is Clare Torry.