Two minutes and sixteen seconds:
1. No chorus, just a refrain line that comes at the end of each verse.
2. A bridge after two verses followed by a third verse with new words.
3. Key change and run through the I-IV-V verse chord progression in the new key one time to get revved up for the rest of the song.
4. Repeat verse one and verse three because they're so sweet. Magnify the sweetness with wordless background vocals on the last one.
That's an AABAAAA structure - an awful lot of As!