Voice:
Beth Gibbons (haunting, noble, decent range)
Looks:
Nicole Scherzinger (lord she's fine)
Style/ Image:
Björk (the original bitch)
Choreography:
Ciara (she got them moves)
Song Writing:
Alanis Morisette (***** so hard on lessors)
Personality:
Peaches (bold, sexed up, smart)
Discography:
Janelle Monae (really solid, cohesive, versatile conceptual work and amazing storyline)
Videography:
Missy Elliot (she got this down)
Tours:
Pink (the whole package, live and kicking

)
Longevity:
Janis Joplin (stood the test of time, still sounds fresh and inspirational)
Sales:
Adele (effortless, based solely on music and far from desperate in any sense, chill target audience/demographic)
Endorsements: Not here for that
Impact:
Madonna (like it or not, everybody knows her, everybody's got an opinion of her)