Question: Which American singer-songwriter who collaborated with Shel Silverstein had a number one single in 1985?

The discography of Rosanne Cash, an American singer-songwriter, consists of thirteen studio albums, six compilation albums, one tribute album, and 39 singles.  The daughter of Johnny Cash, Rosanne Cash recorded her self-titled debut album in 1978 under the German label Ariola.  After signing with Columbia Records in 1979, Cash's second studio album "Right or Wrong" was released.  Its lead single "No Memories Hangin' Around" (a duet with Bobby Bare) reached the Top 20 on the "Billboard" Hot Country Songs chart.  Cash's third studio release, "Seven Year Ache" (1981) gained major success when the title track peaked at number one on the "Billboard" Country chart, followed by "My Baby Thinks He's a Train" and "Blue Moon with a Heartache," which also reached the top spot.  The album's follow-up effort, "Somewhere in the Stars" (1982) produced two Top 10 hits on the "Billboard" chart.  After a 3-year hiatus, Cash issued "Rhythm & Romance" in 1985, which reached #1 on the "Billboard" Top Country Albums list.  It spawned four Top 10 singles.  This included the number one single, "I Don't Know Why You Don't Want Me," which won the Grammy Award for Best Female Country Vocal Performance in 1986.  Her sixth album, "King's Record Shop" was released in 1987.  The album peaked at number six on the country albums chart and certified gold in the United States.  The four singles released from "King's Record Shop" all reached number one on the "Billboard" Country chart between 1987 and 1988, including a cover of Johnny Cash's "Tennessee Flat-Top Box." <SEP> Kristoffer Kristofferson (born June 22, 1936) is an American singer-songwriter, musician, and actor.  He wrote and recorded the songs "Me and Bobby McGee", "For the Good Times", "Sunday Mornin' Comin' Down", and "Help Me Make It Through the Night".  In 1985, Kristofferson joined fellow country artists Waylon Jennings, Willie Nelson, and Johnny Cash in forming the country music supergroup The Highwaymen.  Kristofferson composed his own songs and collaborated with Nashville songwriters such as Shel Silverstein. <SEP>  Active as a group between 1985 and 1995, these four artists recorded three major label albums as The Highwaymen: two on Columbia Records and one for Liberty Records. The Highwaymen was a country music supergroup composed of four of the genre's biggest artists well known for their pioneering influence on the outlaw country subgenre: Johnny Cash, Waylon Jennings, Willie Nelson, and Kris Kristofferson.  Their Columbia works produced three chart singles, including the number one "Highwayman" in 1985. <SEP> "Respectable" is a Mel and Kim song written and produced by Stock/Aitken/Waterman that became a UK number one single for one week in March 1987.  It was the second UK number one single produced by Stock/Aitken/Waterman, following Dead or Alive's "You Spin Me Round (Like a Record)" in 1985, and the first UK number one single that Stock/Aitken/Waterman had written themselves.  The single also topped the charts in Germany, Switzerland, the Netherlands, Belgium, Finland, Australia and New Zealand in 1987.