We might not be a good singer, and singing can make us even more anxious about being judged. However: Yet, we are often more fluent when we sing. Why?

We might not be a good singer, and singing can make us even more anxious about being judged. However: Yet, we are often more fluent when we sing. Why? In my understanding, I think it's more about being judged in regards to the regulation of one's speech-plan execution - that we need to avoid to utter the sounds and words (not specifically the judgements to make the melody). Perhaps attached image that I created explains it more clearly. https://preview.redd.it/c66tc0p19usf1.jpg?width=1408&format=pjpg&auto=webp&s=1fe1dc866f58845b4547388508a052ac8f520eea \~\~ Your thoughts?