She currently lives in Glasgow. Whilst on the show, she mentioned her school years in which she went through rough patches of being bullied. She was picked on due to her love of classical music. She claimed that a few days before the final, her planned performance was changed. She finished in second place after a rendition of Nessun Dorma in the final.
On 19 June 2014, she signed a multi-album deal with Sony Music. Her debut studio album Fantasia was released on 24 September 2014 and debuted at number 18 on the UK Albums Chart and number one on the UK Classical Chart. It was announced that Kay would play the role of Narrator in the 2016 UK touring production of the Andrew Lloyd Webber and Tim Rice musical Joseph and the Amazing Technicolor Dreamcoat.
The tour began in January 2016 and is scheduled to run through July 2016.