'One Less Lonely Girl' collection to hit Wal-Mart
                                
                                
                                    (Newser) -
                                    Justin Bieber,  mop-haired heartthrob  and  undisputed King of Twitter , is expanding his tween empire by launching his very own ... nail polish line. The ultra-glittery 'One Less Lonely Girl' collection by OPI will debut at Wal-Mart over the holidays and then spread like  Bieber Fever  to Target, Sears, and Ulta stores...