“Back to December” by Taylor Swift reenters So Casual 100™ at #84.

So Casual 100™: #84(re) Back to December, Taylor Swift [13 weeks]. *peak: #13*

“Back to December” by Taylor Swift reenters inside the top 50 of So Casual 100™ at #39.

So Casual 100™: #39(re) Back to December, Taylor Swift [12 weeks]. *peak: #13*

“Back to December” by Taylor Swift reenters So Casual 100™ at #94.

So Casual 100™: #94(re) Back to December, Taylor Swift [11 weeks]. *peak: #13*

“Back to December” by Taylor Swift reenters inside the top 50 of So Casual 100™ at #50.

So Casual 100™: #50(re) Back to December, Taylor Swift [10 weeks]. *peak: #13*

“Back to December” by Taylor Swift climbs inside the top 20 of So Casual 100™, rising 40 spots to #13.

So Casual 100™: #13(+40) Back to December, Taylor Swift [7 weeks]. *peak: #13*

“Back to December” by Taylor Swift climbs inside the top 50 of So Casual 100™, rising 33 spots to #33.

So Casual 100™: #33(+33) Back to December, Taylor Swift [5 weeks]. *peak: #13*

“Back to December” by Taylor Swift reenters inside the top 20 of So Casual 100™ at #13.

So Casual 100™: #13(re) Back to December, Taylor Swift [3 weeks]. *new peak*

“Back to December” by Taylor Swift climbs inside the top 50 of So Casual 100™, rising 38 spots to #21.

So Casual 100™: #21(+38) Back to December, Taylor Swift [2 weeks]. *new peak*

“Back to December” by Taylor Swift debuts at #59 in So Casual 100™.

So Casual 100™: #59(re) Back to December, Taylor Swift [1 weeks]. *new peak*