Little Mix star Jade Thirlwall has previously opened up about her battles with anorexia, but in her contribution to upcoming book, The Female Lead: We Rise By Lifting Others, the artist detailed how, and who, helped her overcome her eating disorder.SEE: Jade Thirlwall reveals 'obsession' after sharing first photo with Jordan StephensAccording to an extract obtained by the MailOnline, her recovery was helped massively by her "best friend" at school, Holly Robinson.WATCH: Jade Thirlwall gives tour