Did the cast of Rock of Ages actually sing?

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Tags

1. #starring
2. #giamatti
3. #bryan
4. #russell
5. #1980s
6. #music
7. #diego
8. #includes
9. #jones
10. #leading
11. #catherine
12. #blige
13. #kerman
14. #julianne
15. #leppard
16. #cruise
17. #features
18. #brand
19. #country
20. #malin
21. #hough
22. #cranston
23. #boneta
24. #singer
25. #baldwin
26. #including
27. #artists
28. #ensemble