Challenge #4 was to 'Paper-Piece Your Heart Out' - you were to paper-piece at least two parts of your image.
Here's mine (twice, because I figured I might as well use all the pieces I could from each paper...):
Stamp: PaperWorks Co/LittleLoud Stamps - "Charlotte's Valentine" (40% off, even!)
Papers: BasicGrey 'Euphoria' Collection - "Felicity" & "Utopia" (Also 40% off!!)
Image coloured with Copics - Paper-Piecing used for: Headband, Dress, Pants, All Hearts
Lace from stash