What's the biggest selling single of all time?

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Tags

1. #tonight
2. #something
3. #making
4. #copies
5. #singles
6. #about
7. #selling
8. #began
9. #diana
10. #single
11. #princess
12. #candle
13. #second
14. #1950s
15. #elton
16. #tribute
17. #million
18. #biggest
19. #recording
20. #since
21. #charts