My advice is to not get started on this one. Its incredibly addictive, but Crowdstar has admitted to manipulating the scores. The event challenges are increasingly expensive, making it difficult to play without purchasing diamonds. Under the previous management you could actually get responses from customer service, and they would award you some extra diamonds on the rare cases that there were issues. Now they just dont seem to care, especially about keeping their long-term players.
JenJen Unicorn about Covet Fashion: Dress Up Game