Rayna uses a 4 string tuned BEAD low to high,and for all the 5 stringers out there,it's just a standar 5 string tuning...

Intro/Verse:
D|
A|2-2-3-3-3-3------------
E|------------5-5-5-4-4-4-
B|

Chorus:
D|
A|
E|55555-44444-33333-
B|

"You can't stop me,you know what I am..." 

D| 
A|-------------0-1-1- 
E|3-4-3-3-5-6-------- 
B|