Beyoncé
Fashion: A
Dancing: A+
Vocals: A+
Performance Ability: A+
Personality: A-
Impact: A-

Rihanna
Fashion: A+
Dancing: D-
Vocals: C
Performance Ability: B-
Personality: A+
Impact: B

Ke$ha
Fashion: A-
Dancing: D
Vocals: C-
Performance Ability: A
Personality: A+
Impact: A

Usher
Fashion: B
Dancing: A+
Vocals: A
Performance Ability: A+
Personality: B+
Impact: A+

Ke$ha
Fashion: B
Dancing: B
Vocals: C
Performance Ability: A
Personality: A
Impact: B

Marina and the Diamonds
Fashion: B
Dancing: C
Vocals: B
Performance Ability: B
Personality: B
Impact: D

Lana Del Rey
Fashion: A
Dancing: D
Vocals: B
Performance Ability: C
Personality: B
Impact: B

Ed Sheeran
Fashion: D
Dancing: He doesn't dance
Vocals: A
Performance Ability: B
Personality: B
Impact: C

I did my faves but tried to be compeltely unbiased.

Drake
Fashion: B-
Dancing: D
Vocals: B- (Singing) A (Rapping)
Performance Ability: A
Personality: A
Impact: B+

Lady Gaga
Fashion: F
Dancing: B
Vocals: C
Performance Ability: C
Personality: F

Lana Del Rey
Fashion: B
Dancing: n/a because she doesn't dance and it would be unfair to give her a grade
Vocals: A
Performance Ability: B
Personality: A++