Just had a quick listen, never heard this one before...
Well i havent got all the bits i think but its sounds like the main hook opening riff is
Bminor Amajor then g bass note for one beat moving to D major
then the verse is just D major to A major again using the G to pass back to the D
then back to the beginning bit
The chorusy bit were she sings i want you when i need you is
D,A,G,D
Dont you think its time Bm, A, Em, A
hope that gets you started and you can understand what i´m on about as its probably not too clear
