nostr:npub1nltm0d4ayc327054wut5wap6tdfzqxm87rde0876hu03mrxar0ps6vt44t nostr:npub1cg3leea86jm7vr7a9urx5nvj3n2zg0nkvgvafuwtc6ccxtrdsymqg3hxhl They were laughing because while IU sings a sad song: "I give you my heart" from Crashing Landing on You, yet looking at the fan's funny costume she can't help but laugh and the whole situation makes her fans laugh as well