Today’s random set is 7578 Ultimate Princesses, released during 2006. It’s one of 3 Belville sets produced that year. It contains 149 pieces and 2 minifigs, and its retail price was US$49.99/£29.99.
It’s owned by 173 Brickset members. If you want to add it to your collection you should find it for sale at BrickLink or eBay.