Ryan Cabrera
AJ McLean
Pauley Perrette
Jack Osbourne
Lorde
Tatyana Ali
Lance Bass
LL Cool J
Shar Jackson and daughter Cassie Jackson
Austin Mahone
Macy Gray
Steven Tyler
Kris Kristofferson
Bobbi Kristina Brown and her brother/husband
Chaka Khan
Dot-Marie Jones
Kim Coles
Joey Fatone
Regina King
Source 1, 2, 3, 4, 5 and 6