Question: Which American musician born in 1951 was in a band that had a song certified Gold by the RIAA on December 18, 1990?
Context: Sawyer Brown is an American country music band founded in 1984.  Their discography comprises sixteen studio albums, one live album, and four compilation albums.  Of their albums, three have been certified gold by the RIAA: 1992's "The Dirt Road", 1993's "Outskirts of Town" and 1995's "Greatest Hits 1990-1995".  The latter two are certified gold by the CRIA, as is their 1990 "Greatest Hits" album, while 1989's "The Boys Are Back" is certified platinum by the CRIA. Clay Walker is an American country music artist.  His discography comprises nine studio albums and a greatest hits album, as well as 31 singles. Walker's first four studio albums — "Clay Walker", "If I Could Make a Living", "Hypnotize the Moon" and "Rumor Has It" — are all certified platinum by the RIAA, and his greatest hits album and "Live, Laugh, Love" are each certified gold by the RIAA.  "Clay Walker" is also certified platinum by the CRIA, while "If I Could Make a Living" and "Hypnotize the Moon" are certified gold. Selena Gomez & the Scene, an American band, has released three studio albums, one remix album, seven singles and seven music videos.  The band released their debut album, "Kiss & Tell" on September 29, 2009.  The album debuted at number nine on the US "Billboard" 200 and in March 2010 the album was certified gold by Recording Industry Association of America (RIAA).  The second single from the album, "Naturally", reached the top thirty in the United States, the top twenty in New Zealand, Canada and Germany and the top ten in both Ireland and the United Kingdom.  The song has also been certified platinum in the United States and Canada.  Their second album, "A Year Without Rain" was released on September 17, 2010.  It debuted on the US "Billboard" 200 at number four and was certified Gold by the RIAA in January 2011.  Two singles were released from the album, "Round & Round" and "A Year Without Rain". Iron Flag is the fourth studio album by American East Coast hip hop collective Wu-Tang Clan, released on December 18, 2001 on Loud Records.  It was certified gold in sales by the RIAA.  "Iron Flag" served as the group's second lowest-selling album (687,000 copies), as their record label, Loud, was on the verge of shutting down at the time.  The album debuted at No. 32 on the "Billboard" 200 with 153,000 copies sold in its first week of release.  It has sold 500,000 copies in the United States, & certified Gold by the RIAA on January 29, 2002. Trace Adkins is an American country music singer.  His discography consists of twelve studio albums and six greatest hits albums.  Of his eleven studio albums, six have been certified by the RIAA: 1997's "Big Time" is certified platinum, 2001's "Chrome", and 2006's "Dangerous Man" are certified gold.  His 1996 debut "Dreamin' Out Loud" and 2003's "Comin' On Strong" are certified platinum.  2005's "Songs About Me" is his best-selling album, certified 2× Platinum by the RIAA.  His first Greatest Hits package, "Greatest Hits Collection, Vol.  1", is certified platinum, and the second, "" is certified gold. American singer Mandy Moore has released six studio albums, three compilation albums, two video albums, twelve singles, and thirteen music videos.  After being spotted singing at a recording studio by an artists and repertoire representative for Epic Records, Moore was signed to Sony Music.  Her debut album, "So Real", was released in December 1999.  The album performed moderately on the charts, peaking at number thirty-one on the "Billboard" 200 and was certified Platinum by the Recording Industry Association of America (RIAA).  According to Nielsen SoundScan, "So Real" had sold about 950,000 copies in the United States, by June 2009.  Her debut single, "Candy", peaked at number forty-one on the US "Billboard" Hot 100, and was certified Gold by the RIAA.  It also reached the top forty in Canada, France, Ireland, and Switzerland and the top ten in Australia, New Zealand, and the United Kingdom.  In Australia the song peaked at number two on the ARIA Singles Chart and was certified Platinum by the Australian Recording Industry Association (ARIA).  "So Real" was followed up with "I Wanna Be with You", in May 2000.  It is a re-release of the debut album, with remixed tracks and few new songs, the album reached number twenty-one on the "Billboard" 200 and was certified Gold by the RIAA.  It also went on to sell about 805,000 copies in the US by June 2009.  The album spawned only one single, the title track, which peaked at number twenty-four on the Hot 100, becoming Moore's only top-thirty song in the US and her highest peak to date.  The song also reached number thirteen in Australia and was certified Gold by the ARIA. American rock band Breaking Benjamin has released five studio albums, one compilation album, three extended plays, sixteen singles and ten music videos.  The group has sold over 7 million units in the United States alone, with three platinum records, two gold records, two multi-platinum singles, two platinum singles, and five gold singles as designated by the RIAA.  The band signed with Hollywood Records in 2002 following the success of their independently-released eponymous EP, and began recording their first full-length major-label debut "Saturate" shortly thereafter.  The record peaked at No. 2 on the "Billboard" Heatseekers chart and No. 136 on the "Billboard" 200 chart.  It was certified gold more than thirteen years later.  The band's sophomore effort, "We Are Not Alone", released in 2004, peaked at No. 20 on the "Billboard" 200, and was later certified platinum in the United States and gold in New Zealand.  Breaking Benjamin's third studio album "Phobia" was released in 2006 and reached No. 2 on the "Billboard" 200 chart, No. 1 on the Digital Albums chart, No. 1 on the Rock Albums chart, and was certified platinum nearly three years after its release.  Breaking Benjamin released their fourth record in late 2009 titled "Dear Agony", reaching No. 1 on the Hard Rock Albums and Modern Rock/Alternative Albums charts, No. 2 on the Rock Albums and Digital Albums charts, and No. 4 on the "Billboard" 200.  The record was certified gold three months after its release and was eventually certified platinum seven years later. Steve Walsh (born June 15, 1951) is an American musician, singer and songwriter best known for his work as a member of the progressive rock band Kansas.  He retired from the band in 2014 He sings lead on four of Kansas' best-known hits: "Carry On Wayward Son," "Dust in the Wind", "Point of Know Return", and "All I Wanted", the last two of which he also co-wrote. "Carry On Wayward Son" is a single recorded by Kansas and written by Kerry Livgren for their 1976 album "Leftoverture".  In 1977, the song peaked at No. 11 on the US "Billboard" Hot 100, becoming their first top 20 entry in the nation.  The song was certified Gold by the RIAA on December 18, 1990, and has also sold over 2 million downloads in the digital era. The discography of Shaquille O'Neal, a former American National Basketball Association (NBA) player and rapper, consists of four studio albums, 2 compilation albums, 2 soundtracks, one unreleased album, and 9 singles.  O'Neal played in the NBA from 1992 until 2011.  Around 1993, O'Neal was signed to Jive Records where he released his debut album, "Shaq Diesel", in that year.  The album peaked at number 25 on the "Billboard" 200, number 10 on R&B/Hip-Hop Albums, and was certified platinum by the Recording Industry Association of America (RIAA).  "Shaq Diesel" produced four singles.  The first, "What's Up Doc?  (Can We Rock)", peaked at number 39 on the "Billboard" Hot 100, number 56 on R&B/Hip-Hop Songs, number 22 on Rap Songs, and was certified gold by the RIAA.  The second, "(I Know I Got) Skillz", peaked at number 35 on the "Billboard" Hot 100, number 20 on R&B/Hip-Hop Songs, number 3 on Rap Songs, and was certified gold by the RIAA.  It also peaked at number 34 on the New Zealand Singles Chart.  The third, "I'm Outstanding", peaked at number 47 on the "Billboard" Hot 100, number 29 on R&B/Hip-Hop Songs, and number 6 on Rap Songs.  Internationally, it peaked at number 43 on the New Zealand Singles Chart and number 70 on the UK Singles Chart.  The fourth, "Shoot Pass Slam", did not chart.
Answer: Steve Walsh