The Mamas & the Papas "High on Arrival", that she had been in a long-term sexual relationship with her late father. Denny Doherty's solo career faltered after the appearance of "Whatcha Gonna Do?" in 1971. The follow-up, "Waiting for a Song" (1974), was not released in the US, although a 2001 reissue by Varèse Sarabande gained wider distribution and the album is now available as a digital download. It features Michelle Phillips and Cass Elliot as backing vocalists, the latter in what proved to be her last recorded performances. A single from the album, "You'll Never Know", made the adult contemporary charts. Doherty then turned
Casey Donovan (singer) 2011 movie version, Donovan was not cast. 2011 saw Donovan reprise her role of Cynthia Macrae in another tour of the hit show "The Sapphires". The tour ran during February in ACT and NSW, and was followed by two weeks in the UK in March. In August/September 2011, Donovan created the role of Mama Cass in the world premiere of new musical "Flowerchildren – The Mamas & the Papas Story" written by Peter Fitzpatrick and produced by Australian company Magnormos. She was joined by Matt Hetherington as John Phillips, Laura Fitzpatrick as Michelle Phillips, and Dan Humphris as Denny Doherty.