The theme is the harm of objectifying female beauty.  Vibrant and feminine background colors contrast with a black and white photo of a woman, crowned with a tiara.  The  "princess" image is omnipresent in society in fairy tales, movies, clothing, party themes in childhood and beauty contests. These are all damaging to healthy development.  The cage denotes trapping in this persona or arresting development.  The charms hanging on the diamond necklace are the keys to undoing this harm:  self love, education, independent financial security, metamorphosis, time to heal and  healthy loving relationships.