Amy Childs has penned a heartfelt tribute to her daughter Polly as she celebrates her 6th birthday.The 32 year old former TOWIE star is mum to Polly, six, and Ritchie, five, from previous relationships, whilst she just welcomed twins– a boy and a girl – with her fiancé, Billy Delbosq.To celebrate Polly's birthday, Amy shared a montage of clips to Instagram that saw the little girl posing for a snap with her mum, holding her new sister and sitting with Billy. In the caption, she wrote: "My Polly Pocket.