Demon Days (Gorillaz) Easter Egg - Danger Mouse Artwork Cameo

In the pamphlet for demon days there is a page of artwork for every song (except "Intro.") If you look at the drawing for the song "Last Living Souls," the band is hanging out with outlines of people. On the figures' faces are number. Look at person number 23 to the far left. That is Danger Mouse, the producer of the album.
Proof: On the Gorillaz website, there is a semi-hidden room called the Room Of Brians. When you enter this room you see an arry of portraits of people all named Brian. Danger Mouse has the biggest picture (his real name is Brian Burton.) He is pictured exactly the way as he is in the Demon Days booklet. Compare these pics:
Room of Brian Danger mouse:
http://i3.photobucket.com/albums/y60/treblemaker91/dangermouse.jpg
Demon Days Danger Mouse (look at number 23!)
http://img141.echo.cx/img141/5341/29aq.jpg