When you announce the name of the song you are going to sing right now, which expression is correct or most appropriate,; "Now, I'll be singing XXX." "Now, I'll sing XXX." or "Now, I'm singing XXX."?
The expected situation is where you give some words of congratulations in front of people and after finishing the speech, you're going to sing a song.
Best Answer
Your intention is to announce the song that you will sing immediately following the announcement.
The choices you've offered for the announcement are:
The first two expressions are fine. "I'll" means "I will" or "I shall", which indicates a future action.
"Now" has just enough latitude in its semantic range to mean next in your context:
The third statement would be fine if instead of simply speaking that statement, you sang it. Otherwise, it doesn't sound as fluent as the other two choices.