Explain simply why teenaged Christian music singer Amy Grant and country music singer Ronnie Milsap is the correct answer to: Passage: "What a Difference You've Made in My Life" is an inspirational song written by Archie Jordan and first made famous by two artists during 1977: teenaged Christian music singer Amy Grant and country music singer Ronnie Milsap.

Question: Based on this passage, who sang what a difference you made in my life?. Explanation:
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To answer the above question, the relevant sentence is: "What a Difference You've Made in My Life" is an inspirational song written by Archie Jordan and first made famous by two artists during 1977: teenaged Christian music singer Amy Grant and country music singer Ronnie Milsap.
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