You might have seen the commercial in which a trio of vocalists sings the Liberty Mutual jingle. After they sing it, one of the singers adds a vocal flourish at the end, provoking irritated looks from the other two singers.
Whenever I see that commercial, I think, "Give that singer some slack. He embellished the jingle in the best possible way--briefly and with notes that complement the jingle's melody."
That's not too much to ask.