Alibaba hosts a event, often with star performers, for its annual November 11 shopping festival (PR for Alibaba) In recent years November 11 has become an important calendar date for thousands of shoppers and retailers. It is now known for being when one of the world’s biggest online shopping festivals is held. Known as ‘Singles’ Day’ festival, the event was launched in 2009 by Chinese e-commerce behemoth Alibaba Group. More than a decade later and the day has evolved to be spread out this year between two windows, November 1-3 and the main November 11 event. Some 290000 brands will…