Hi gang. I'm Matt, the artist that drew this week's Mosaic. First off, thank you all for the kind words. They are greatly appreciated. And now, please allow me to address this naked lady issue.
That's Joana's "Treesha." I snuck her into the background in the hopes that she would color the page for us. As you can see, she's an amazing colorist. She's done a lot of IDW's stuff. Remember Casey Coller's Optimus with American Flag AHM cover? She colored it.
http://khaamar.deviantart.com/art/Treesha-177916847?q=gallery%3Akhaamar%2F1961889&qo=11&catpath=&order=0&offset=11Hope that clears up the issue.