The 5th Momoiro Utagassen event took place on December 31, 2021. Umamausume was one of the guests.

The Umamusume members who appeared were Waki Azumi (和氣あず未) , Machico, Kouno Marika (高野麻里佳) , Takayanagi Tomoyo (高柳知葉) , Ogura Yui (小倉唯) , Takahashi Minami (高橋未奈美) , Tadokoro Azusa, Ohhashi Ayaka (大橋彩香) , Ueda Hitomi, Toono Hikaru (遠野ひかる) , Saeki Iori (佐伯伊織) .

They sang "Umapyoi Densetsu" (うまぴょい伝説). The seiyuu lined up in two rows, one row of 5 seiyuu on the main stage, and one row of 6 seiyuu on the upper deck in the back. The camera showed the main 5 seiyuu much more than the other 6. The main seiyuu were Azumi, Yui, Minami, Machico, and Marika.