The BeFoRe U music is an Rare Fortnite music. BeFoRe U was available via the Item Shop for 200 V-Bucks and you can buy it from Fortnite Item Shop when it will listed.
Fortnite BeFoRe U Skin Details
Press play and enjoy a track from Joytime IV by Marshmello.
Fortnite BeFoRe U Skin PNG Images
Here is the PNG images of BeFoRe U below!