Group A:
Kylie Minogue
P!nk
Mariah Carey
Shakira
Group B:
Alanis Morissette
Annie Lennox
Gladys Knight
Eva Cassidy
Group C:
Britney Spears
Celine Dion
Tina Turner
Alicia Keys
Group
Etta James
Dusty Springfield
Dolly Parton
Sonique
Group E:
Amy Winehouse
Madonna
Dido
Nelly Furtado
Group F:
Whitney Houston
Tammy Wynette
Chaka Khan
Christina Aguilera
Group G:
Sinead O'Connor
Beyoncé
Cher
Sheryl Crow
Group H:
Avril Lavigne
Diana Ross
Bette Midler
Sarah McLachlan
I didnt know most of them so i just ramdomly picked some haha