Question: When was the  American actor, singer and songwriter born who's album was A Touch of Blue?
Context: Thomas D'Arcy is a Canadian singer and songwriter born in Guernsey, Channel Islands.  D'Arcy's family immigrated to Toronto, Ontario in 1981.  He has been a member of indie rock bands The Carnations, All Systems Go! , Small Sins, Another Blue Door, The I-Spies, BROS., k-os and Major Maker, among others.  He is a graduate of philosophy from the University of Toronto. Jessica Baldassarre known as Jessie Baylin is a Nashville-based singer/songwriter born April 4, 1984, in the Gillette section of Long Hill Township, New Jersey.  Her debut album "You" was produced by Grammy Award winner Jesse Harris. Jack Starr is a heavy metal and blues guitarist and songwriter born of a French mother and American father.  He learned to play guitar by ear, copying the riffs of R&B records.  His first semi-professional band was Les Variations in France with future members of Trust.  In the U.S. Starr emerged on the rock and metal scene in 1981, forming, together with Joey Ayvazian, David DeFeis and Joe O’Rielly, the first incarnation of the heavy metal band Virgin Steele.  The new band was selected in 1982 by Mike Varney of Shrapnel Records to appear on the label's compilation album "U.S. Metal Volume 2".  The song Starr sent in for the compilation was "Children of the Storm".  After only two albums, "Virgin Steele" of 1981 and "Guardians of the Flame" of 1982, Starr left Virgin Steele in 1983 because of musical differences with the band’s front man and other main songwriter David DeFeis. David Bruce Cassidy (born April 12, 1950) is a retired American actor, singer, songwriter, and guitarist.  He is known for his role as Keith Partridge, the son of Shirley Partridge (played by his stepmother Shirley Jones), in the 1970s musical-sitcom "The Partridge Family", which led to his becoming one of popular culture's teen idols and pop singers of the 1970s.  He later had a career in both acting and music. Shane Harte is a Canadian actor, singer and songwriter born in Brampton, Ontario.  He attended St. Roch Catholic Secondary School.  He plays the series lead, Luke, in the Family Channel series "Lost & Found Music Studios".  He also plays Luke in the hit children's TV program "The Next Step". Dara Joy Maclean (born May 20, 1986) is an American contemporary Christian singer and songwriter born in Miami, Florida and raised in Fort Worth, Texas, ever since she was eight years old.  On July 12, 2011 Maclean released the album entitled "You Got My Attention", her first full-length studio album. Moriah Castillo Peters (born October 2, 1992) is an American contemporary Christian singer and songwriter born in Pomona, California and raised in Chino, California and Ontario, California.  In 2012, Peters released the album entitled "I Choose Jesus", her first full-length studio album. O'Chi Brown (born Doris Gubbins) is an English singer and songwriter born in Tottenham, London, England.  She scored two hits on the Dance Club Songs, the most successful being "Whenever You Need Somebody," which hit number one in 1986.  The song's producers (Stock Aitken Waterman) would recycle the song for English singer Rick Astley a year later, and it would be the title of his debut studio album on PWL. Matt O'Ree (born 26 February 1972) is an American blues-rock guitarist, singer, and songwriter born and raised in Holmdel, New Jersey.  O'Ree is best known as the founder and front man for the Matt O'Ree Band which he formed in 1994.  In 2015, Matt joined Bon Jovi as their touring rhythm guitar player next to Phil X.  He joined just before the Bon Jovi Live!  tour which began on September 11, 2015, in Jakarta, Indonesia at the Gelora Bung Karno Stadium and continued throughout Asia with the final show on October 3, 2015 in Tel Aviv, Israel at Hayarkon Park.  This tour was in support of Bon Jovi's 2015 album Burning Bridges. A Touch of Blue is David Cassidy's 17th studio album.  A bonus disc was included with this album that contained re-recorded versions of Cassidy's previous songs.
Answer: April 12, 1950