Philippines TOP 20 [MAY 2013] – Boracay Insider Report
The Top 50 Best Songs of 2013 (So Far…) – A Rock Subculture Journal Editorial
50 Best Songs You Might Have Missed in 2013 | GQ
Pop Danthology 2013 - Mashup of 68 songs! - playlist by Cincai.La | Spotify
Shazam Predicts Major Hits for the Summer 2013, Including Lana Del Rey from the Great Gatsby Soundtrack and Singles from Passenger and Icona Pop | Business Wire
The Hot 100's All-Time Top 100 Songs | Billboard – Billboard
100 And Single: How The Hot 100 Became America's Hit Barometer : The Record : NPR
The Top 40 biggest singles of 2013 on the Official Chart
All The Official Albums Chart Number 1s
List of songs by Taylor Swift - Wikipedia
Guess who's #1 in KPOPALYPSE's 30 favourite k-pop songs of 2013 : r/crayonpop
Spotify's API
The K-pop Playlist | Mia is 짱
Top 40 Pop Songs – January 2013
Most Distinctive Fourth of July Songs | Music Machinery
2013 Greatest Christian Hits: Piano/Vocal/Guitar Book
Most Popular Songs Of 2013 - Rate Your Music
Eurovision Song Contest Malmö 2013: We Are One by Various Artists (Compilation, Pop): Reviews, Ratings, Credits, Song list - Rate Your Music