Lifehouse was a science fictionrock opera by the Who intended as a follow-up to Tommy. It was abandoned as a rock opera in favour of creating the traditional rock album, Who's Next, though its songs would appear on various albums and singles by the Who, as well as Pete Townshend solo albums. In 1978, aspects of the Lifehouse project were revisited by the Who on Who Are You. In 2000, Townshend revived the Lifehouse concept with his set The Lifehouse Chronicles and the sampler Lifehouse Elements. On 1 May 2007, Townshend released online software called The Lifehouse Method in which any "sitter" could create a musical "portrait". The site is now defunct.