My youngest sister, Emily, turns the big 3-0 this month. Along with my other sister and mom, we tried to think of something fun to do for her birthday. Way back when I turned 30, they made me a book of letters from friends which was so sweet! We threw Allison a surprise dessert party for her 30th birthday. Being that Emily's husband is throwing her a party already, we racked our brains for something special to do for Emily. We decided upon a surprise girls' night out- pedicures, shopping…