Nobody guessed this one correctly. The #7 song of my particular lifetime so far is "You Light Up My Life" by Debby Boone. With 10 weeks at #1, it was the biggest hit of the 1970s.
Up next at #6, a band many people love to hate -- a rock-pop band from the 2000s. Give 'em a dollar, and they'll give you change. Who are they, and which song?