How many #1 hits does Mariah Carey have?

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Tags

1. #voice
2. #scaled
3. #expect
4. #carey
5. #supreme
6. #octaves
7. #scales
8. #mariah
9. #course
10. #multiplatinum
11. #decade
12. #billboard
13. #three
14. #counting
15. #serious
16. #number
17. #career
18. #hours