Using acoustic analysis technology, powered by The Echo Nest, Spotify has grouped the 4X songs into most and least happy, danceable, artificial, as well as pinpointed some other categories.

Country music's Christmas songs are like side dishes at your fancy holiday dinner. Most country fans reach for the standards, but a few will always prefer those specialty treats. Others you ...

The 70s gave us some of the catchiest, feel-good tunes ever—songs that made ... Let’s dive into 13 songs from the 70s that fooled us with their happy vibes but carried some truly tragic ...

Of course, there is the classic 'Happy Birthday' song everyone knows ... In this gallery, we compile some of the greatest birthday songs ever, from upbeat tunes to emotional songs.