My Happy Song comes from Super Simple Songs, the educational children's music project known for simple singalong tunes on YouTube. The 'happy happy happy' chorus became a recognizable snippet beyond kids' videos, spreading through wholesome edits, parenting clips and meme compilations. Its exaggerated cheerfulness gives it a second life online, where creators use it sincerely for cute moments or ironically over chaos. Like the baby laughing meme, it works because the joy feels instantly contagious.