Love love loved this challenge, and was thinking along the lines of a vintage Valentine's Day card.
I think I threw everything AND the kitchen sink in it. There are plenty of hearts, but this is so layered that specific shapes are hard to identify.

Katie Pertiet:
Letter Box Love: Hearts No1
Taped Word Strips No5
XOXO Layered Template No2 (bits and pieces)
Collage Ephemera No1 & 2

Studio DoubleD:
Layer Works 413 & 410 (bits and pieces)