A Happy Birthday Feed and Music Player Style Poster is a type of birthday greeting that combines a social media feed format and a music player design. It features photos of the celebrant, along with birthday wishes and greetings from friends and family. In addition, the poster has a music player feature that allows the sender to include the celebrant's favorite songs or a playlist for their special day. This type of poster is a fun and creative way to send birthday messages and add a personalized touch to the celebration.