The singer recently signed a multi-album deal with Sony Classical and her debut will be released on September 24, reported Daily Star.
"It is an honour to be working with Sony Classical, it is a dream come true," said Kay, who trained at The Royal Conservatoire of Scotland.
"The support I have received from the public has been overwhelming and I'm excited to continue on my journey with them."
Fantasia includes 'Un Bel Di' from Madame Butterfly, 'O Mio Babbino Caro' from A Room with A View and 'Nessun Dorma', which she performed on the final of 'Britain's Got Talent'.