Happy National Sibling Day! (Yes, this actually exists.)

As much as parents would never admit it, there's usually one sibling that they bond with more than the others. The same thing happens in Hollywood as well, but the public is a little more blatant about their preference. There are plenty of super-famous celebrities with brothers or sisters you've never heard of, despite many of them making earnest efforts to get into the public eye. And while they've been able to ride the coattails of their siblings to an acting spot here and there, it's safe to say they won't become bona fide A-listers anytime soon.

Check out our roundup of 11 black sheep celebrity siblings after the jump!

When most fans want to give their favorite celebrity a little something, they make a card or leave a nice tweet.

Then there are the more... devoted fans. 30 Seconds to Mars frontman Jared Leto revealed during a recent radio interview that a fan mailed him an actual human ear! "Someone cut their ear off once and sent it to me, that was very strange. A whole ear. The Van Gogh move," he said. "The note just said, 'Are you listening?' I never knew who it was, who's missing their ear out there." No word on what Jared did with the ear, either...

However, he's not the only famous face to receive a truly effed up gift. From body parts to actual bodies, check out six other crazy gifts that celebs have received!