Honest, I'm not mad. I was flicking through my album covers earlier and where there should have been an album cover for "Westlife's Coast To Coast", there is instead a photo of a man standing against a wall. No idea who he is but he aint connected to Westlife!
Black MacBook Mac OS X (10.4.7) I have better music in my collection too
For Cover Flow, iTunes picks the artwork of the first track of an album.
Select it and Get Info (command-I). Then select the artwork tab.
You should now be able to get rid of that guy (select the picture and click 'Delete).