Fetching details from the dictionary...
loving to sing (a song); singing with great fondness
この歌は何十年も愛唱されてきた名曲だ。
This song is a masterpiece that has been lovingly sung for decades.
卒業式で愛唱歌を全員で合唱した。
Everyone sang the beloved school song together at graduation.
祖父の愛唱する民謡を初めて聴いた。
I heard the folk song my grandfather loves to sing for the first time.