I ripped a Lily Allen CD on to my iTunes library and i also put some of the songs on to my USB pen drive, which I use on windows computers at school. When I pluged that drive in to my mac after plugging it in to the school computers it had 3 images which looked like album artwork, but this dosent show up in iTunes. Any help? Not major just wondering why, 'coz it makes cover flow useless really, also when I buy tunes from the iTunes store artwork comes up.