I took a quick look at the ultimate-guitar tab and it's pretty good. The first part of the section labeled Chorus sounds to me like it is Bm, Gmaj7, F#m, G, D, F. At the end of the Bb measures he changes to Bb(#11) and at the end of the Em he changes to what sounds like Em(#11).
Bb(#11) x1335x
Em(#11) 022300