Context: "Ruby Tuesday" is a song recorded by the Rolling Stones in 1966, released in January 1967. The song, coupled with "Let's Spend the Night Together", was a number-one hit in the United States and reached number three in the United Kingdom. The song was included in the American version of Between the Buttons (in the UK, singles were often excluded from studio albums).

Question: who was the original singer of ruby tuesday?
Steam of consciousness below:
The relevant information to answer the above question is: "Ruby Tuesday" is a song recorded by the Rolling Stones in 1966, released in January 1967.
So, the answer is the Rolling Stones.