Who sang the song which was before Loverboy on  the U.S. Billboard Hot 100?
Loverboy (Billy Ocean song):  It was produced by Keith Diamond and reached a chart high of number 2 on the U.S. Billboard Hot 100 (behind "Careless Whisper" by Wham! Careless Whisper: "Careless Whisper" is a song by English singer-songwriter George Michael (sometimes credited to "Wham!
George Michael