The chorus to Skylar Stecker's Rascal (released July 17, 2015) echoes the verse to Specials' 1979 Elvis Costello-produced ska hit A Message to You, Rudy (which is a cover of Dandy Livingstone's rocksteady song Rudy, A Message to You). Both songs contain the lyric "Stop your messing around," sung with the same melody, and feature prominent horn lines.
The chorus chord progression and vocal melody to One Direction's Drag Me Down (released August 7, 2015) is very reminiscent of Ginuwine's Pony (released August 20, 1996, and co-written/produced by Timbaland). [Thanks to Andrew Zucker for this one!]
The chorus vocal melody to American duo Timeflies' song Worse Things than Love featuring Natalie La Rose (to be released: September 18, 2015) echoes the verse vocal melody from Toto's 80s chart-topper Africa (released May 10, 1982) from the Grammy-winning album Toto IV. Compare the lines, Worse Things than Love: "Take a chance with me tonight, I know you feel it so do I", and Africa: "I hear the drums echoing tonight, but she hears only whispers of some quiet conversation."
Icelandic band Kaleo's song All The Pretty Girls (released January 20, 2015) is reminiscent of the Australian singer-songwriter Vance Joy's Riptide (released May 21, 2013). Similarities include: chord progression (both songs are in the key of C# and follow a vi-V-I progression), voice characteristics (similar male tenor/falsetto timbres), melody (ATPG's lead guitar melody and Riptide's verse vocal melody).
As a musician and composer, I’m often struck by similarities between pop songs. If you’ve ever listened to a tune on the radio and thought to yourself, “this sounds really familiar,” or “what does this melody remind me of,” (or more bluntly, “this song is a rip-off of …”) then you have shared in the experience.