the floor is shot from a completely different angle than the foot, so it looks wrong. we're seeing the top of the floor, and the side of her foot. they don't match.
use a photo of a floor and microphone that's shot at the same angle - or try transforming the floor layer so it looks more convincing.
here's a shot with the floor and the heels shot from the same angle - we see much less of the floor. we're not looking down at it as much.