For me the best example of The Siren is a famous Arabic singer in Lebanon called Haifa Wehbe. If you see her videos her body movements and facial expressions are very inviting and sensual (especially the way she looks at the camera) she dances very delicately as if her hips would brake if she shakes too much making her look very delicate (a sign of feminity) and classy but when she sings and when she speaks she seems very innocent and naïve, even if she is clearly not; it will take more than one video to really study this ultimate seducer but here’s one where I think you can see all the things I’m talking about.
(Skip to the 0:22 mark to see a Siren in action)
En Español Aquí/ In Spanish Here