Answer by taking a quote from the following article:

King Diamond are a Danish heavy metal band formed in 1985 by vocalist King Diamond, guitarists Andy LaRocque and Michael Denner, bassist Timi Hansen and drummer Mikkey Dee. Diamond, Denner and Hansen had recently departed the group Mercyful Fate, and decided to form a new band under the King Diamond moniker, as it was already known from the Mercyful Fate days. In 1986, King Diamond released their debut album Fatal Portrait. Since then the band have released a total of twelve studio albums (most of them concept albums), two live albums, two extended plays, five compilations and five singles.

In June 1990, King Diamond began recording fifth studio album at Sweet Silence Studios in Copenhagen, Denmark. The drums on the album were played by Snowy Shaw using drum pads. Released on October 30, 1990, The Eye debuted at number 179 on Billboard 200. However, the band did not tour in support of the album, due to lack of label support. Following The Eye, Hal Patino and Pete Blakk were replaced by Sharlee D'Angelo and Mike Wead respectively. However this line-up ended-up not recording any material, as vocalist King Diamond reunited with Mercyful Fate in 1993 (King Diamond would balance recording and touring with both Mercyful Fate and his eponymous band throughout the 1990s).  After recording and touring with Mercyful Fate, King Diamond reformed his eponymous band in 1994. With the line-up of King Diamond, Andy La Rocque, as well as guitarist Herb Simonsen, bassist Chris Estes and drummer Darrin Anthony, the band spent September through October, 1994, recording their next album. Released on June 6, 1995, The Spider's Lullabye was the band's first album on Metal Blade Records, as well as their first studio release since Fatal Portrait to not be a concept album. The album went on to peak at number 31 on the Finnish album charts. In March 1996, King Diamond began recording their seventh studio album at the Dallas Sound Lab. Released on October 1, 1996, The Graveyard saw King Diamond returning to writing concept albums. The album also charted at number 23 in Finland. After the album's release, drummer Darrin Anthony was forced to leave the band due to a car accident and was subsequently replaced by John Luke Hebert.  On February 24, 1998, King Diamond released the album Voodoo, which charted at number 27 on the Finnish album chart and at number 55 on the Swedish album chart. After the album's release, guitarist Herb Simonsen was replaced by Glen Drover. When Mercyful Fate was put on hold in 1999, King Diamond began recording the album House of God at the Nomad Recording Studio in Carrollton, Dallas, Texas, with their new bassist Paul David Harbour, who had replaced Chris Estes. Released on June 20, 2000, the album peaked at number 60 in Sweden. After the album's release, guitarist Glen Drover and drummer John Luke Hebert were replaced by Mike Wead and Matt Thompson respectively.

What were some of their hit singles?
Released on October 30, 1990, The Eye debuted at number 179 on Billboard 200.