Not sure if this was a song in a movie or commercial or maybe I've heard it in both?
There was a group of people walking towards the camera in slow motion and there was a bass guitar playing a slightly upbeat song. It could be the intro to a song.
This would have been in the past 5 or so years in the US. I really want to know if the song was an actual song or just written for a scene. I'm sure I've heard it in more than one place. Not much to go on, sorry!