burning question (English) — a question that deserves or demands discussion
Example: . I don’t think there’s any doubt that he loves her, but will he marry her? That’s the burning question.
"burning question" in lyrics
Yeah we're all a little guilty but the vanity
Who we are and who we can't afford to be
Trying so hard to get the attention
Who's looking now is the burning question
Somebody special has a van sticker familyThree Days Grace - The New Real