How to restore UI font?

I was playing around with my fonts on my mac and I am afraid I over-written some of the defaults... now my fonts are bold a. Anyone can help?

thanks!

This thread can be locked. I have resolved it.

I had to "resolve" the LucidaGrande font (under FontBook) and that fixed it (after a restart)

Awesome! Glad to see you got your problem fixed .

-NC