Chicago | Hard Habit to Break

“Hard Habit to Break,” a 1984 power ballad, was one of Chicago’s biggest hits and part of the band’s era of increasingly pop-friendly tunes. David Foster, well-known for producing lush songwriting, was one of the song’s co-writers and arrangers at this time, layering the band’s trademark horns with towering strings and synth saturation like there was no tomorrow.

The modulations are everywhere: 0:35, 1:00, 1:32, 1:56, 2:19, several quick pivots during the bridge around 3:12, and 3:18.

The Stylistics | Stop, Look, Listen

Another harmonically lush track by the Philly Soul gurus The Stylistics. “Stop, Look, Listen” (1971) packs so much into a hit song of less than three minutes’ length — including a few time signature shifts, plenty of orchestral instrumentation, and an uncharacteristically simple direct modulation at 2:21.

Duncan Sheik | Barely Breathing

Duncan Sheik‘s tunes are full of quirks — harmonic and otherwise — but fewer full modulations. His best-known hit, 1996’s “Barely Breathing,” sticks to fairly straightforward territory through the first two verses and choruses. But then the bridge (2:40) presents several short but compelling key-of-the-moment segments (I major / V minor pairs) that don’t closely relate to the rest of the tune — but then, that’s often true of a good bridge. By 3:09, we’re ready to dive back into the familiarity (and relative simplicity) of the chorus as it reverts to the original key.

Kenny Loggins | This is It

This 1979 release by Kenny Loggins, with co-writing, keyboards, and back-up vocals by Michael McDonald, features the harmonic complexity for which both artists are known. The bridge starts at 2:43, shows signs of a big change on the way at 2:57, and wraps up at 3:06 as the modulation hits.

According to Loggins, the melodic and harmonic ideas for the tune were finished long before the lyrics. The songwriting team had initially focused on a crossroads moment in a troubled romantic relationship. But the topic shifted to an adult son encouraging his ailing elderly father to fight hard for his health in the face of a worsening medical condition — a slice from Loggins’ own life. An unlikely hit, for sure, but it reached #11 and won a Grammy.