GRAB YOUR SOCKS AND PULL, CHEEKIES (and that shouldn't be too hard since you wear tube socks up to your thighs) -- because today is Letitia Dean's 40th birthday. Yes, that's right. Your little Sharon. 40 big ones. Why, it seems like only yesterday when she was a sweet young thing with too much mousse who slept with both Mitchell brothers. Ahhhh, memories. Now, if we could only find out what happened to Disa. . .