Front.
These are new designs using overlays to create effects, this is something to consider as it's different and making things brighter is a common theme within the pop genre.
The first one is a ligher picture and has different hues on it to make it look different and for the text to stand out.
The second uses slight colour to make it more fun, making the clouds pink gives an essence of pop to the picture.
Back
I have edited the back of the cd too, I have found that there is something fun and different about these, especially the second one which has hints of a picture but also different colours interlinked with it.