What does "along" in this sentence mean?
Answer from a Native speaker
Here, "along" means "with" the other people who are laughing. So if the person she's singing about also laughs in the situation, she'll laugh too as if everything is fine. It also has the nuance of cooperating with the situation and not going against it. She laughs in a situation that feels terrible to her. Ex: I'll go along with your plans if you promise the situation is over afterwards. => cooperation Ex: I'm coming along to the fishing trip. => with