keisha is as close to Aaliyah's appearance as it's going to get.

http://highbridnation.com/wordpress/wp-content/uploads/2008/05/keshia-chante-4.jpg

most importantly I think she can nail her mannerisms, dance, and study her swag cose enough to pull it off. She is working closely with Aaliyah's family and choreographers. Plus, Aaliyah was one of her idols even before she died.