Here's how it drops.
The basic chords throughout the chorus and other stuff are:
C - G# - D# - A#
Also, the part where the girl plays the solo on the piano... on guitar, it's easy. There is a 'low' version and a high.
The 'low' is like this:
G - 8-7-8-8-10-8-8-13-12-12-8-7-8 (2x then band comes in.)
The high is like this:
B - 16-15-16-16-18-16-16-21-20-20-16-15-16- (2x then band comes in.)
I know- it's a stretch! Either way it works, but the higher one matches to the song way more than the lower.
-Just wanted to clarify some stuff.