Office Clip Art has to be one of my favorite pieces of software. No, it's not because of lame, cliché clip art like the following:
(Although I sometimes like using such clip art in team-wide status mail in order to be ironic.) Office Clip Art has a lot of good art (and a lot of bad art, too). When I needed to create lots of graphical buttons for Microsoft Popfly's Game Creator, Office Clip Art was a huge, huge help. Many of my Windows Phone 7 app icons were also inspired by Office Clip Art. I've spent lots of time (too much time) perusing the clip art catalog, so I'm more familiar with it than most. I get a kick out of recognizing pieces of clip art when people use them. This happens a lot. Not just on paper signs used by local small businesses, but on banner ads and websites for Fortune 500 companies!
Therefore, I was a bit intrigued when Apple unveiled the new iTunes logo. I knew it reminded me of a series of Office Clip Art icons (there are many icon sets that share a similar style), and I was pretty sure there was even one with a musical note in it. Sure enough, there's a somewhat-similar icon, although with a different musical note. If you combine it with another piece of clip art, you get pretty close:
Then again, there are also pieces of Office Clip Art that are similar to the old iTunes logo, so I'm not sure who is mimicking whom:
(I'm just joking, by the way. I'm sure that Office Clip Art was not involved when Apple designed their icon!)