Added missing arguments to Django Admin setup.

gabigarrero_music/Homepage/admin.py

@@ -18,4 +18,8 @@ class SongAdmin(admin.ModelAdmin):
     model = Song
     list_display = ("song_title", "song_length", "lyrics", "music_video")
     search_fields = ("song_title", "lyrics")
-    list_filter = ("song_title")
\ No newline at end of file
+    list_filter = ("song_title")
+    
+admin.site.register(Artist, ArtistAdmin)
+admin.site.register(Album, AlbumAdmin)
+admin.site.register(Song, SongAdmin)
\ No newline at end of file