After 4 years of hard work, they've finally reached #1 on Oricon Daily Chart. 18/2/2011 is the date for their 1st major album, FIVE TREASURE ISLAND n the day they rank #1 in the chart. They are celebrating it n also all Primadonna too. It's a thing that Primadonna really proud of. And this date also is their 1st debut anniversary. Let's celebrate this everyone!!!