From the Adorama YouTube Channel:
Every studio needs a mirror but to avoid accidental light bounce it's usually kept well away from the shooting area . However if used carefully, a mirror can make a great prop. In this video Gavin Hoey shows you how to use a regular household mirror in a small home studio and create a stunning reflection portrait.
Gavin covers all the essential information you need to recreate this photo including, what type of mirror, how to light a pure white background and some simple Photoshop tricks that help give the final mirror image some polish.