Christina Aguilera (feat. Demi Lovato) | Fall in Line

“Fall In Line” by Christina Aguilera (featuring Demi Lovato) is the second single from the album Liberation (2018). The New York Times calls the track “a defiant dirge addressed directly to ‘little girls’ … it insists, ‘You do not owe them your body and your soul.’” The key change is at 3:00.

Andrea Bocelli | Because We Believe

Bocelli’s “Because We Belive” has a textbook example of a “common tone” modulation: a single note is sustained through key change, thus transforming its harmonic function. And the second, at 4:20, is the rare downward modulation, moving from E to D. David Foster is at the keys (he co-wrote the song with his daughter Amy for the 2006 Turin Olympics).