Sing along
Definition 1 of 1
Pro Tip 1/3Enjoyment Expression
Used to show you're having fun and enjoy the music, not focused on vocal skill. 
Everyone would sing along at the party, smiling and dancing to the beat.
Pro Tip 2/3Group Activity
Often done in a group setting, creating a sense of unity and shared experience. 
The crowd at the concert sang along together, adding to the electric atmosphere.
Pro Tip 3/3Spontaneity
Usually spontaneous, joining in when a familiar song is played without planning. 
She heard her tune on the street performer's guitar and spontaneously sang along.