Ever since Catherine Middleton chose an Issa dress for her and Prince William's engagement announciation the label has been crazyli popular. Not to mention when her sister Pippa Middleton started getting more and more media space, the crowds have screened her choice for clothing. The sisters have relied on Issa for a long time and now the brand is selling "sold outs" with every item.
Catherine Middleton in Issa
Her sister Pippa in Issa