15. John Lennon for OLPC
File this one under "just plain wrong": In 2008, the One Laptop Per Child (OLPC) foundation used John Lennon's likeness to promote its organization's laptop donation program. The group went as far as to hire a voice-over actor and manipulate old video footage to make it seem like Lennon himself was actually delivering the ad.
Imagine really bad judgment. It isn't hard to do...
Next page: Alan Alda for IBM