Question: Hollywood Rose was an American hard rock group co-formed by an American musician that has been the lead singer of what band since 2016?
Context: AC/DC are a hard rock band formed in Sydney, Australia in 1973 by brothers Angus and Malcolm Young.  Although the band are considered pioneers of heavy metal, its members have always classified their music as "rock 'n' roll".  AC/DC underwent several line-up changes before releasing their first album, "High Voltage", in 1975.  Membership remained stable until bassist Cliff Williams replaced Mark Evans in 1977.  In 1979, the band recorded their highly successful album "Highway to Hell".  Lead singer and co-songwriter Bon Scott died on 19 February 1980, after a night of heavy alcohol consumption.  The group briefly considered disbanding, but soon ex-Geordie singer Brian Johnson was selected as Scott's replacement.  Later that year, the band released their best-selling album, "Back in Black".  The band's next album, "For Those About to Rock We Salute You", was also highly successful and was their first album to reach number one in the United States.  AC/DC declined in popularity soon after the departure of drummer Phil Rudd in 1983.  Poor record sales continued until the release of "The Razors Edge" in 1990.  Phil Rudd returned in 1994 and contributed to the band's 1995 album "Ballbreaker". " Stiff Upper Lip" was released in 2000 and was well received by critics.  The band's new album "Black Ice" was announced in June 2008 and was released on October 20, 2008.  The album's first single, "Rock 'N Roll Train", earned AC/DC a Grammy nomination for Best Rock Group or Duo with Vocals.  Another "Black Ice" track, "War Machine," gained AC/DC their first Grammy Award win, for Best Hard Rock Performance. No. 4 (officially stylized as № 4) is the fourth album released by American hard rock band Stone Temple Pilots, released on October 26, 1999, by Atlantic Records.  The album was a return to the band's earlier hard rock roots, while also blending elements of heavy metal, psychedelic rock, and alternative rock.  Despite the lack of promotion due to singer Scott Weiland's one-year jail sentence shortly before the album's release, "No. 4" was certified Platinum by the RIAA on August 7, 2000, and by the CRIA in August 2001.  The song "Down" was nominated for Best Hard Rock Performance at the Grammy Awards.  The album also produced one of STP's biggest hits, "Sour Girl", which charted at #78 on the "Billboard" Hot 100, their only song to appear on that chart.  The CD was originally released as a digipak, then later changed to a standard jewel case. Hollywood Rose was an American hard rock group formed in 1983 and is best known as the precursor group for what would eventually become Guns N' Roses.  The group was founded by Axl Rose, Izzy Stradlin and Chris Weber while they were aided during live shows by Rick Mars, Johnny Kreis, Steve Darrow and Andre Troxx.  Rose, Stradlin and Weber, along with Kreis, recorded a five-song demo in 1984.  However, after a number of lineup changes, which includes Weber and Kreis being replaced by Slash and Steven Adler (both then of Road Crew) respectively as well the departure of Stradlin, the group disbanded the same year. L.A. Guns are an American hard rock band from Los Angeles, California, formed in 1983.  As of 2017, the lineup consists of Phil Lewis (lead vocals, rhythm guitar), Tracii Guns (guitar), Michael Grant (guitar), Johnny Martin (bass, backing vocals) and Shane Fitzgibbon (drums).  The first incarnation of the group was formed by Tracii Guns in 1983 and merged with fellow Los Angeles group Hollywood Rose to form Guns N' Roses in 1984.  In 1985, the group was reformed by Guns and singer Paul Black adding Mick Cripps and Nickey Alexander.  Black would soon be replaced by former Girl singer Phil Lewis while former Faster Pussycat bassist Kelly Nickels was added to the group.  Later, Alexander would be replaced by former W.A.S.P. drummer Steve Riley with this being known as the "classic lineup" of L.A. Guns.  They achieved moderate chart success in the late 1980s and early 1990s.  However, the group went through numerous lineup changes (with Riley being the most consistent member) and failed to regain mainstream attention. Balance is the tenth studio album by American hard rock band Van Halen, released on January 24, 1995 by Warner Bros.  Records.  The album is the last of the band's four studio releases to feature Sammy Hagar as the lead singer.  "Balance" reached number 1 on the U.S. "Billboard" 200 in February 1995 and reached Triple Platinum status on May 12, 2004 by selling more than three million copies in the U.S. "The Seventh Seal" was nominated for a Grammy for Best Hard Rock Performance. Guns N' Roses is an American hard rock band originally formed in 1985 by members of Hollywood Rose and L.A. Guns.  After signing with Geffen Records in 1986, the band released its debut album "Appetite for Destruction" in 1987.  All songs on the album were credited as written by the full band, composed of vocalist Axl Rose, guitarists Slash and Izzy Stradlin, bassist Duff McKagan and drummer Steven Adler, while "It's So Easy" was co-written by West Arkeen and "Anything Goes" was co-written by Chris Weber, formerly of Hollywood Rose.  The following year saw the release of the band's second album "G N' R Lies", made up of all four tracks from 1986's "Live ?! *@ Like a Suicide" EP and four acoustic-based tracks. Chris Weber (born October 16, 1966) is an American musician best known as the guitarist and founder of the groups U.P.O. and Hollywood Rose (which featured future Guns N' Roses members Axl Rose, Slash, Izzy Stradlin, and Steven Adler).  With U.P.O., he released two albums, "No Pleasantries" (2000) and "The Heavy" (2004), while the Hollywood Rose demos, recorded in 1984, were released in 2004 titled "The Roots of Guns N' Roses". W. Axl Rose (born William Bruce Rose Jr.; raised as William Bruce Bailey; February 6, 1962) is an American singer, songwriter, record producer and musician.  He is the lead vocalist of the hard rock band Guns N' Roses, and has also been the band's sole constant member since its inception in 1985.  In addition to Guns N' Roses, he has been the lead singer of AC/DC since 2016.  Due to his powerful and wide vocal range and energetic live performances, Rose has been named one of the greatest singers of all time by various media outlets, including "Rolling Stone" and "NME". Guns N' Roses is an American hard rock band formed in Los Angeles, California in 1985 by members of Hollywood Rose and L.A. Guns.  The band has released six studio albums, two live albums, two compilation albums, two extended plays, seven video albums, eighteen singles, twenty four music videos and one video single.  Guns N' Roses signed a deal with Geffen Records in 1986, after the independently released EP "Live ?! *@ Like a Suicide" a year before.  Its debut studio album "Appetite for Destruction" was released in 1987, reached the top of the "Billboard" 200 and sold 18 million units in the United States and approximately 33 million units worldwide. "Home Tonight" is a power ballad by American hard rock band Aerosmith.  Written by lead singer Steven Tyler, the song is a ballad and is the last track on Aerosmith's hard rock album "Rocks".  It was released as the second single from "Rocks" in 1976 and reached #71 on the "Billboard" Hot 100.
Answer: AC/DC