Room Makeovers were events where you could get prizes reading the main stories and participating in the style challenge. Some prizes you could get were furniture and other things to decorate your room.
In some of these events you could also get cards from the characters. These were special messages that included very short stories. Here is a compilation of all the ones I had:
Note: I tried to include the event the cards were part of, but I don't have any screenshots to confirm most of them, I just used the themes and the dates of the events to guess. If you have more info about this or anything I wrote is wrong, please let me know!