https://www.theverge.com/2018/10/24/18018572/facebook-music-profile-stories-lip-sync-live-lyrics

Facebook is rolling out more music features today, bringing more ways to integrate its licensing partnership with all three major labels into Stories, user profiles, and its Lip Sync Live feature.

Starting today, users will be able to add music stickers to their Facebook Stories. You can search for songs, pick out the part you want to share, and add the sticker with the artist and song name. It works exactly the same way as it does on Instagram Stories, which introduced the feature in June.