Tori Amos: 'Princess musical has to be better than good'
19 September 2012 Last updated at 00:31 BST
Singer Tori Amos says she hopes her musical The Light Princess will be ready by the end of 2013.
The singer said the project, which was put on hold in October last year, is a "great challenge".
She told the BBC's Tim Masters she has been working with the National Theatre's Sir Nicholas Hytner on making the musical "better than good".