When it comes to planning your favorite girl's birthday, there are a few focal points that every hostess with the mostess puts her time and energy into. There are the invitations, the activities, decor, and of course, the all-important cake. Whether she's turning 2 or 10 and is into ponies, puppies, princesses, or most anything else, you've come to the right place for inspiration. Keep reading . . . these 50 ideas will literally put the icing on your cake!