Dropped D tuning
This may not be exact but this is how I play it. Our band only has one guitarist, so I have to do a lot of fill in work.
1st Chorus: 2nd Verse is same as first
3rd Verse:Repeat til end of verse and go straight into Chorus, no bridge.
3rd Chorus repeats 4 times, bass drops after fourth for the "I get down,
he lifts me up" part, then Chorus repeats til end.