I just wanted to point out a couple of things about this song. One is that it has a pre-chorus (occurring for the first time at 0:31). If we let A be the verse, B be the pre-chorus, and C be the chorus, here is our structure:
A' is the instrumental break over the verse chords (heard first after the fourth verse and then repeated as a coda at the end).
That's a total of ten segments, though! In a two-minute and twenty second song!
The pre-chorus is really something. The song is in G major, but modulates to Bb major via a borrowed iv chord, C minor, which becomes the ii chord in a ii-V-I. At the end of four bars, though, the pre-chorus modulates again, this time to C minor. The way it lands on the tonic C minor chord right on the downbeat of measure five feels truly like we have entered a different section of the song again! Quickly, though, that idea is dispelled and the pre-chorus is wrapped up as we move harmonically from i (C minor) to VI (Ab major) and then, as the melody returns to the tonic note of C, to an F major chord, which becomes the dominant chord for yet another modulation (to Bb major for the chorus). It all takes place in eight bars.