This dress is made from Simplicity Pattern #5448.  This is not the only pattern I use, but I seem to have only gotten photos of dresses made from this one.   The two little girls are daughters of a friend and I made their dresses for them to wear to my 2nd Annual Wild West Party.  The purple dress had to get a little "surgery" to the back of the neck in order to fit over her head, but it ended up coming out fine.