Alexandra Stan, 34
Singer
Jordan Davis, 35
Jeongyeon, 27
LeToya Luckett, 43
Hannah Spearritt, 42
Alexander O'Neal, 70
Kevin Rowland, 70
Oliver Lynn, 69
Joan Osborne, 61
Lim Na-young, 28
Rachel Platten, 42
Dhvani Bhanushali, 25
Ali Campbell, 65
Limahl, 65
Yoon Bo-mi, 30
Darci Lynne, 19
AmaLee, 32
Giveon, 29
Mon Laferte, 40
Kimberly Wyatt, 42
Chloe Lattanzi, 38
BeBe Winans, 61
Katie Melua, 39
Tamar Braxton, 46
Jeff Gutt, 47
Rich Cronin, 36
Cindy Cash, 64
Park Ji-hoon, 24
Maggie Lindemann, 25
Ana Gabriel, 68
Royston Langdon, 51
Dinah Jane, 26
Maria Brink, 46
Jihyo, 27
Dahyun, 25