WHO IS MORE BEAUTIFUL?

I didn't quite set the photos right..i'm still new at this. Will definitely get it right with time. Anyway, here are 18 fotos of some of my all time favourite beauties, but I just cant figure out who is more beautiful..can you guys help me out?
Nike Osinowo v Helen Prest Ajayi...Naomi v Tyra Banks
Regina Askia v Bianca ojukwu...Beyonce v Rihanna
Priyanka Chopra v Aishwarya Rai...Genevieve v Omotola
Miss World 06 v Miss Universe 06...Agbani v Chinenye Ochuba
Halle Berry v Toni Braxton

Nike Osinowo

Helen Prest Ajayi