Facebook has officially rolled out the ability to add songs to Stories and News Feed posts. The social network started testing the feature with a small number of users in September. Now that it's available to everyone, you'll be able to access it by taking a photo or a video using the Facebook Camera (or by uploading one from your gallery), tapping on the sticker icon and choosing the music sticker. The social network will then show you a list of songs to choose from -- pick one to load it and move the slider to the part of the track you want to use.