RT @LittleMixOffic: Mixers! Here's a video message from the girls! Mixers HQ x #HowYaDoinOutNOW http://t.co/b37MbR9B7e Tatis de Styles (@Willyismine1313) April 17, 2013 http://smarturl.it/HowYaDoin Little Mix's new single 'How Ya Doin'?' is out now on...