S：Aretha Franklin
A+:Mariah Carey，Whitney Houston，Patti LaBelle，Celine Dion
A:Beyonce，Christina Aguilera，pink，Lauryn Hill，Leona Lewis，Lady Gaga，Jessie J
A-:Kelly Clarkson，Ariana Grande，Faith Hill，Tonight Braxton，Carrie Underwood
B+:Alicia Keys，Sia，Demi Lovato，Adele，Keyshia Cole，Avril Lavigne，Amy Winehouse，Miley Cyrus
B:Mary J Blige，Ciara，Rihanna，Katy Perry，Fergie，Rita Ora，Camilla Cabello，Halsey
B-:Ellie Goulding，Britney Spears，Bebe Rexha
C+：Billie Eilish，Madonna，Shakira，Kesha， Lana Del Rey
C：Jennifer Lopez，Lorde，Janet Jackson，Carly Rae Jepsen……
F:Taylor Swift，Selena Gomez，Olivia Rodrigo