A streaming media service can permit artists or other users to create and upload “posts” to the service. Posts can include text, references to content items in the catalog of the streaming media service, and/or non-catalog media content items that are created by the artist and uploaded as part of the post. Posts can be presented to users as they browse the catalog of the streaming media service and/or in a dedicated feed. The rendering of a post on a user device can include graphical user interface controls that allow the user to access content items referenced by or included in the post.