You never know what celebrities might be keeping from us, good or bad. In this case, it's more surprising.

For instance, did you know that Christopher Walken was lion tamer -- when he was 15!? If that doesn't blow your mind, how about the fact that despite how she looks and acts, Kesha is actually pretty smart, and Danica McKeller (Winnie Cooper from 'The Wonder Years') might be even smarter than that!

Watch the video for more mind blowing celebrity facts: