This one turned out really well:

Scarlett focuses, as Tim Meadows, Mario, and Larry the Cable Guy check her out from the back…
Amber over at painfullyhip.com, a fashion blog, sent me this Mii, which she created using miieditor.com. After berating and browbeating her for several minutes for not owning a Wii, I marvelled at what she’d created:

Here’s the ‘official’ Wii version including the reference pic she provided:
Scarlett Johansson, by amber

I tried to get Scarlett’s mouth right and it just wouldn’t work. Amber is the first I’ve seen to use accessories (in this case the beauty mark or the mustache) to slightly part the lips… the effect is perfect.
If you get a chance, drop by amber’s blog and tell her she rules! And be sure to yell at her for not owning a Wii, despite having such a knack for Mii art.