Rock stars love to give the proverbial (and sometimes literal) middle finger to the establishment, and there's no better way than with a shocking album cover. As the recent kerfuffle over Nirvana's 'Nevermind' cover being banned from Facebook proves, many of the most infamous album covers are still controversial today. Join us for a look at the 10 Most Shocking Album Covers in Rock Music. (Note: Before you scroll down, some of these images are not safe for work -- unless you work at Tommy Lee's house. Then you're probably fine.)