Article continues below advertisementBritney Spears was recently spotted in Los Angeles with a champagne flute in hand, raising eyebrows and concerns over her recent erratic behavior. The "Toxic" singer was seen leaving the Stonehaus wine bar in Westlake Village, Calif., according to photos obtained by Page Six.Article continues below advertisementSource: MEGABritney Spears was seen leaving a wine bar in Los Angeles.Article continues below advertisementThe singer addressed the paparazzi in an Instagram video, expressing her frustration over being photographed.