The chorus vocal melody for Tears for Fears' Mad World from their debut album The Hurting (released September 20, 1982) echoes the bridge vocal melody to Yusuf Islam's (the artist formerly known as Cat Stevens') Matthew and Son, the title track from his debut album (released March 10, 1967). Both sections feature the same exact melody over a ii-V (or minor2-5) chord progression, though in different keys (MW: E major; MaS: D major). Fun side note: Matthew and Sons features uncredited Led Zeppelin bassist John Paul Jones.
The bridge vocal melody to Rihanna's hit Stay featuring Mikky Ekko (released January 7, 2013) bears some structural resemblance to the bridge vocal melody to Over the Rainbow, the Oscar-winning Arlen and Harburg ballad from the 1939 classic The Wizard of Oz. While in different keys (Stay: C/Amin, OtR: Ab), both melodies follow the same rhythmic four-measure pattern: a bar of alternating diatonic eight-notes (OtR: 5-3, Stay: 1-2), followed by a second bar in which the melody ascends, followed by two sustained notes in the third bar, and essentially a whole-note rest for the fourth. Compare the melody for the lines, OtR: "Some-day I'll wish upon a star and wake-up where the clouds are far be-hind me", and Stay: "Fun-ny you're the bro-ken one, but I'm the on-ly one who needed sa-ving.