Have you ever been at a restaurant and heard a song on the radio and could not remember the name of it? I know i have and it happens all the time or sometimes its a new song and i just can't place the artist. Well there is an app for that and it is called Shazam. Now shazam has been around for a while now and while shazam itself is not new the introduced a new feature called Pulse which shows you trending songs for music discovery. It also shows you things your friends are tagging as well. You can read more about the updates here