Karl Martin Sandberg, Mikkel Eriksen, Tor Hermansen and Other Songwriters Behind the Hits of Katy Perry and Taylor Swift - The Atlantic
Chart: The Most Common Christmas Songs In Movies | Statista
45 Best Pop Songs of the 21st Century
Top Hits of 2015 on Spotify
The songs that truly defined the 2010s - BBC Culture
Kpopalypse's 30 worst k-pop songs of 2015 | KPOPALYPSE
51 Best Songs Of All Time (Famous & Iconic Songs) - Music Grotto
Top 50 K-Pop Songs of 2015: Part Two (25-1) | The Bias List // K-Pop Reviews & Discussion
28 Best Songs of the 2010s - Top Songs of the Decade 2010 to 2019
Top 100 New Worship Songs of 2015 - PraiseCharts
The 100 best songs of 2015
Best Love Songs of the 21st Century – Billboard
Song of Summer 2015: An Updated Contenders List
2015 Greatest Pop & Movie Hits: Piano Book | Alfred Music
YouTube Releases List of Top 10 Most Watched K-Pop Music Videos of 2015 and Channels With Most Growth - 빅뱅 BIGBANGmusic
2015 Pop Hits - Compilation by Various Artists | Spotify
The Complete List: NPR Music's Favorite Songs Of 2015 : NPR
My 15 Favorite Workout Songs Of The Year | Workout songs, Workout music, Pop workouts
Blank Space: What Kind of Genius Is Max Martin? | The New Yorker
The Top 50 K-Pop Songs of 2015 (Day Five: 10-1) | The Bias List // K-Pop Reviews & Discussion
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Top 25 Pop Songs of 2015 So Far
Popular Songs of 2015: Top 50 List
Billboard Hot 100 No. 1 Songs of 2015 | Billboard – Billboard
Top 100 Most Popular K-Pop Songs of All Time - Spinditty
Just Dance 2015 - Wikipedia
