Here are my guesses...
Ann-I think it has been confirmed she is an Aries. No surprise, really.
Yaya-I would say she is definitely a Leo. Proud, egotistical, aloof but fire burning beneath the surface, regal, self centered...and accomplished. Plus I have read Leo women tend to be striking.
Norelle-Libra. If there is an identifiable Libra, she is it. (Watch me be wrong though )
Eva-A Sagittarius. Those who have said it before...loud, opinionated, confrontational, and hilarious. Her eyes are large and full of depth, another Sag characteristic.
Amanda-Probably an air sign...I am leaning towards Gemini as well...but she could also be a Pisces.