singalong
/ˈsɪŋəˌlɒŋ/noun
1- an informal occasion when people sing together in a group（非正式的）跟唱歌咏会。
1.1
- usu. as modifier a light popular song or tune to which one can easily sing along in accompaniment跟唱歌曲：
an album featuring simple, singalong tunes.
以简单的跟唱曲调为特色的唱片集。