Scientists have discovered what the happiest songs of all time are

Pics 28/09/2016
Recent research has shown how music can effect how we're feeling, both positively and negatively.
Some scientists put some work into finding out what songs make us feel the happiest and came up with this list.
The factors included lyrics, tempo and also the key of the song.
Have a look through the photos above and try not to singalong in your head!