I need 2D VFX compositing for music video

We've got a music video which needs a small bit of Green Screen VFX & tracking work, roughly 20 seconds long.

The videos referenced above can be viewed here:

https://vimeo.com/showcase/6191623
password: SLvfx

The aim of the video is to play on the classic Snow White scene "Mirror Mirror on the wall, who's the fairest of them all".

In the music video we have a woman walk into shot and up to a mirror to check herself out.

At 00:11s (VFX intro) she changes into an evil queen and the mirror lights up with fire/flames.
Another version of herself appears inside the mirror (G_SCREEN_QUEEN).

At 00:14s (VFX intro) we see the image of the artist (G_SCREEN_SL) appear after another set of flames & some smoke, to signify that he is the fairest of them all.

The woman goes back into her normal self (00:17 - VFX intro), whilst angry she storms off and the music video begins.

Please have a look at the original Disney film for reference - https://www.youtube.com/watch?v=Br0DCEEBplY