There are some upbeat songs that are just upbeat, and there are some that deal with surprisingly dark subject matter, like these four.

According to a new study by Breezit, which analyzed 2,000 wedding-themed playlists and nearly 50,000 songs on Spotify, Whitney Houston holds the most popular wedding song.

To signal the change of atmosphere, from traditional and formal to lighthearted and upbeat ... analyzing 2,000 wedding-themed playlists on Spotify (with a total of 49,091 songs), researchers ...