Do you hear what I hear?

Okay then, here's a little puzzle to keep you all off the streets for a while! They're all songs with a festive theme. How many do you know?

1. OIRDC
2. WSWTFBN
3. JB
4. SN
5. OLTOB
6. AIWFCIAB
7. LD
8. WC
9. DDMOH
10. CROAOF
11. WACIB
12. DTH
13. FTS
14. HTHAS
15. JTTW
16. ICUTMC
17. TFN
18. OCAYF
19. RTRNR
20. TTDOC
21. GKW
22. GRYMG
23. THATI
24. TCC
25. WTKOOA
26. AFTROG
27. WW
28. ISMKSC
29. JBR
30. TLDB
31. MBC
32. OCT
33. WWYAMC
34. IWICBCED
35. OCOCE
36. WITA
37. ISTS
38. LIS
39. RATCT
40. AWGMOO
41. SCICTT
42. ITBM
43. DTKIC
44. MXE
45. LC
46. SB
47. TVMHABB
48. SATWS
49. G
50. AIAM
51. CTYE
52. MAW
53. HWCAW
54. DHFC
55. ASCT
56. IDJ
57. LTC
58. LSN
59. IBIFC
60. AFONY