This is the CORRECT way to play the intro.  I can't believe some of the idiots on this 
that submit wrong tabs that just make you feel more stupid by trying to play them. played 
Drop D

E-----------------------------------------------|
B-----------------------------------------------|
G------9---9---9----9-10----10---10-------------|  just repeat this...
D-------------------------------------12--------|
A--7-8---8--------------------------------------|
D------------0---0-------10---10----8-----------|

this is the pre-chorus (girl slow down...)

E-----------------------------------------------|
A----10----10----10----10-11----11----11----8---|
D-----------------------------------------------| this repeats a couple times
G-----------------------------------------------|         also...
B-----------------------------------------------|
D--8----8-----12----12-------10----10----8------|


ENJOY!  and if it's not right, or you're not sure, then don't post tabs!!!