Oops! She's pregnant again!

Britney Spears announced that she was pregnant with baby number 2 on Letterman the other night...

I have heard so many great jokes about her new pregnancy. My favorite was Joel McHale from The Soup on E! He said, "Britney Spears is pregnant with her second child. That's good news for child endangerment enthusiasts!"

What's your favorite Britney joke so far?