What necklace did Lady Gaga wear at Oscars?

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Tags

1. #before
2. #hepburn
3. #audrey
4. #oscars
5. #including
6. #weighs
7. #suspended
8. #tonight
9. #carats
10. #diamond
11. #necklace
12. #twice
13. #diamonds
14. #tiffany
15. #brilliant
16. #world
17. #renowned
18. #platinum
19. #alternating
20. #cushion
21. #round