Jesy Nelson announced on Instagram on Monday that she is leaving Little Mix to focus on her mental health. The singer admitted that being in a group took a toll on her and she was ready to focus on ‘a new chapter.’ She also thanked her bandmates, Jade Thirlwall, Perrie Edwards and Leigh-Anne Pinnock for the ‘amazing memories.’ Little Mix was formed in 2011 during the British version of ‘The X Factor.’