Leona Lewis has today unveiled the tracklisting for her third studio album, 'Glassheart.'

The 2006 X-Factor winner, who had originally planned to release the record last year, took to Twitter this afternoon to post a picture of a handwritten note which lists the 12 tracks that will appear, adding:

"Check out my album track listing!!! Cant wait for you to hear it! X"

The follow-up to 2009’s 'Echo,' which opens with her new single 'Trouble' but doesn’t include her Avicii-sampling Top 10 hit 'Collide,' is scheduled for release on October 15.