Question: "Strange Changes" is a song that was co-written by the former wife of an American actor known for his role in what 1970's musical-sitcom?

Context paragraphs:
Lisa Collins (actress): Lisa Collins (born 1968) is an Australian actress best known for her starring role in the movie "Fix" (1997).  Collins is also the former wife of actor Billy Zane (from 1989 to 1995).  Collins also played Louisa, wife of Morgan Earp (Bill Paxton) in the film, "Tombstone" (1993).

Tom Powers: Tom Powers (July 7, 1890 – November 9, 1955) was an American actor in theatre, films, radio and television.  A veteran of the Broadway stage, notably in plays by George Bernard Shaw, he created the role of Charles Marsden in Eugene O'Neill's "Strange Interlude".  He succeeded Orson Welles in the role of Brutus in the Mercury Theatre's debut production, "Caesar".  In films, he was a star of Vitagraph Pictures and later became best known for his role as the victim of scheming wife Barbara Stanwyck and crooked insurance salesman Fred MacMurray in the film noir classic, "Double Indemnity" (1944).

Bobby Cannavale: Robert Cannavale ( ; ] ; born May 3, 1970) is an American actor known for his leading role as Bobby Caffey in the first two seasons of the crime drama series "Third Watch".  Cannavale also had a recurring role on the NBC comedy series "Will & Grace" as Will Truman's long-term boyfriend Officer Vincent "Vince" D'Angelo, for which he won the 2005 Primetime Emmy Award for Outstanding Guest Actor in a Comedy Series, and portrayed Gyp Rosetti during the third season of the HBO drama series "Boardwalk Empire", for which he won the 2013 Primetime Emmy Award for Outstanding Supporting Actor in a Drama Series.  In 2016, he starred in the HBO drama series "Vinyl", produced by Martin Scorsese and Mick Jagger.

Strange Changes: "Strange Changes" is a song that was co-written by Lynsey de Paul and Sue Shifrin (Sue Shifrin Cassidy), former wife of David Cassidy.  It was released as a single in 1981 by de Paul on the MCA label.  A promo 12 inch single with an extended version of the song was also released.  The recording was co-produced by Jon Kelly and de Paul.  While the song was not immediately as commercial as many of her other hits, it had a laid back feel ahead of its time that grows on repeated listening.  Writing on her website, de Paul revealed she wrote this song when she was living in the United States and wanted to come back home to the UK.  "It meant leaving behind a life that had taken five years to build and a long term relationship with James Coburn.  I literally felt that I was going through a strange change" she said.  De Paul performed the song on a number of TV programmes including the German TV series "WWF Club", and the UK TV programme "Razzamatazz" in 1981.

Bebe Neuwirth: Beatrice "Bebe" Neuwirth ( ; born December 31, 1958) is an American actress, singer and dancer.  On television, she is known for her portrayal of Dr. Lilith Sternin, Dr. Frasier Crane's wife (later former wife), on both the TV sitcom "Cheers" (in a starring role), and its spin-off "Frasier" (in a recurring guest role).  The role won her two Emmy Awards.  On stage, she is known for her Tony Award winning roles of Nickie in the revival of "Sweet Charity" (1986), and Velma Kelly in the revival of "Chicago" (1996).  Other Broadway musical roles include Morticia Addams in "The Addams Family" (2010).  Since 2014, she has starred as Nadine Tolliver in the CBS drama "Madam Secretary".

That's When I Love You: "That's When I Love You" is a song co-written and recorded by American country music artist Phil Vassar.  It was released in October 2001 as the fifth and final single from his debut album Phil Vassar.  It peaked at number 3 on the Hot Country Songs chart, and number 37 on the Billboard Hot 100 chart.  Vassar co-wrote this song along with his former wife Julie Wood.  They both also wrote one of his other singles "The Woman in My Life", which was a top 20 hit in 2006.

Romeo Delight: "Romeo Delight" is a song by Van Halen from their 1980 album "Women and Children First".  The band played the song on the subsequent Invasion tour.  Many of the melodies for the song were taken from a demo track the band did called "Get the Show on the Road".  Singer David Lee Roth changed the lyrics of the second verse for the band's 1982 "Hide Your Sheep" tour.  This is most apparent during the 1983 US Festival where he made his usual changes before famously yelling "I forgot the fuckin' words".  Eddie Van Halen's former wife Valerie Bertinelli claimed it was her favorite Van Halen song in her book "Losing It: And Gaining My Life Back One Pound at a Time".  A live version of the song is included on the 2015 live album "Tokyo Dome Live in Concert"

Kale Browne: David Charles "Kale" Browne (born June 16, 1950) is an American actor.  He was born in San Rafael, California.  Browne was the first to play the roles of Michael Hudson on "Another World" (1986–93, 1995–98) and Sam Rappaport on "One Life to Live" (1998–2001).  Browne has a son, Nicholas, with former wife Karen Allen.  He was married to Allen from 1988 to 1998.

David Cassidy: 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.

Priscilla Presley: Priscilla Ann Presley (née Wagner; born May 24, 1945) is an American actress and business magnate.  She is the former wife of the late American singer Elvis Presley as well as co-founder and former chairwoman of Elvis Presley Enterprises (EPE), the company that turned Graceland into one of the top tourist attractions in the United States.  In her acting career, Presley starred with Leslie Nielsen in the three successful "Naked Gun" films, and played the role of Jenna Wade on the long-running television series "Dallas".

Supporting paragraphs: Strange Changes David Cassidy
Answer: The Partridge Family