PHOTOS: Private concerts, public controversy

The spotlight focused on the music industry when several stars like Mariah Carey and Usher went public about playing private gigs for members of Libyan leader Moammar Kadafi's family. While the musicians offered to donate their proceeds to charity, the news drew attention to a bigger cultural phenomenon: celebrity artists being hired by rich, powerful and sometimes disreputable clients. Here's a list of other musicians that drew ire for performances connected to dictators.