One of Paul Simon‘s many solo hits, 1975’s “Still Crazy After All These Years” pushed the album of the same name to #1. The form is quite unpredictable: the first modulation happens at 1:25 (at the start of a bridge, including an odd-metered measure thrown into the mix). Then another pivot at 1:38 into a darkly intriguing instrumental interlude, followed by a key change into a sunnier instrumental section at 2:12, finally settling into another verse and another harmonic shift at 2:50.
Connect-the-dots songwriting, this ain’t!