Here's what the ACOUSTIC GUITAR plays in the intro:
[ Tab from: http://www.guitaretab.com/t/taylor-swift/273593.html ]
e|-----------------------------------------------------------------|
B|-----7---7---7-10-----7---7---7-10-----7---10--------------------|
G|-7-9--------------7-9--------------7-9----------7---------7h9----|
D|------------------------------------------------------7h9--------| x2
A|-----------------------------------------------------------------|
E|-----------------------------------------------------------------|
Here's what the Electric Guitar plays in the intro:
e|------------------------------------|
B|---8---7----------------------------|
G|-----------7------------------------|
D|---------------7-----------(7h9)x4--| x2
A|------------------------------------|
E|------------------------------------|