1 of 8 Whitney Houston | Photo: Getty Images
2 of 8 Kelly Clarkson | Photo: Getty Images
3 of 8 Elton John | Photo: Getty Images
4 of 8 Billy Joel | Photo: Getty Images
5 of 8 Adele | Photo: Getty Images
6 of 8 Air Supply | Photo: Getty Images
7 of 8 Mariah Carey | Photo: Getty Images
8 of 8 Phil Collins | Photo: Getty Images