Question: What band that formed in London in 1970 was guided by Sharon Osbourne Management?
Context: Ozzfest is an annual festival tour of the United States and sometimes Europe (and for the first time Japan in 2013) featuring performances by many heavy metal and hard rock musical groups.  It was founded by Ozzy Osbourne and his wife Sharon Osbourne, both of whom also organise each yearly tour with their son Jack Osbourne.  The Ozzfest tour has featured bands of a variety of genres within heavy metal and hard rock, including alternative metal, thrash metal, industrial metal, metalcore, hardcore punk, deathcore, nu metal, death metal, post-hardcore, gothic metal and black metal.  Ozzy Osbourne and Black Sabbath have played the tour several times over the years. The X Factor is a British television music competition to find new singing talent.  The tenth series began airing on ITV on 31 August, and finished on 15 December 2013.  Dermot O'Leary returned to present the main show on ITV and Caroline Flack was back to present spin-off show "The Xtra Factor" on ITV2, along with comedian Matt Richardson, who replaced Olly Murs.  Flack also presented backstage segments during the live shows.  Louis Walsh, Gary Barlow and Nicole Scherzinger returned as judges for their respective tenth, third and second series, with Sharon Osbourne returning to replace Tulisa after five series away.  This was Barlow's final series as a judge.  Osbourne and Scherzinger also departed the series, but reprised their roles as judges with Walsh again in series 13. Rock of Love: Charm School, known as Sharon Osbourne' s Charm School in the UK, and as Charm School: Rock of Love Girls in Germany, is the second season of the VH1 reality television series "Charm School".  Fourteen contestants from both seasons of "Rock of Love with Bret Michaels" are competing to develop proper etiquette in order to win $100,000.  Sharon Osbourne is the host.  "Rock of Love: Charm School" first aired on VH1 on October 12, 2008.  Brandi Mahon was ultimately named "Charm School Queen" and was awarded the $100,000. The Diary of a Madman Tour was the second concert tour by English heavy metal vocalist Ozzy Osbourne.  It was undertaken in support of Osbourne's second album "Diary of a Madman" and covered Europe, North America, and Asia.  This was Rhoads's last tour as he died in a plane crash at a small airport in Leesburg, Florida, on March 19, 1982, during the first leg of the tour.  The band took a two-week break after his death.  Ozzy and Sharon Osbourne restarted the tour with ex-Gillan guitarist Bernie Tormé, who only performed a couple of shows before being replaced by future Night Ranger guitarist, Brad Gillis. Aimee Rachel Osbourne (born 2 September 1983) is an English-American actress and musician.  She is the eldest daughter of Ozzy and Sharon Osbourne.  While her siblings Jack and Kelly achieved pop culture fame for appearing in the family's MTV reality series "The Osbournes", the more private Aimee declined to appear on the show, feeling that doing so would typecast her and affect her musical career.  She has expressed discomfort with some of her parents' behavior on television. The Sharon Osbourne Show refers to either of two TV chat shows hosted by Sharon Osbourne – the original US version, or the more recent UK (ITV) version.  These are described separately below. "Mama, I'm Coming Home" is the third song on the 1991 album "No More Tears" by the English heavy metal singer Ozzy Osbourne.  Sharon Osbourne has previously claimed that the song was written by Ozzy in tribute to her, however, the song was actually co-written by Lemmy Kilmister, Zakk Wylde (Osbourne's long-time guitarist) and multi-platinum producer/engineer Tom Fletcher.  Lemmy was brought in as a songwriter for the "No More Tears" album, providing lyrics for the tracks "Mama I'm Coming Home" , "Hellraiser", "Desire", and "I Don't Want to Change the World." Queen are a British rock band that formed in London in 1970.  Their classic line-up was Freddie Mercury (lead vocals, piano), Brian May (lead guitar, vocals), Roger Taylor (drums, vocals), and John Deacon (bass guitar).  Queen's earliest works were influenced by progressive rock, hard rock and heavy metal, but the band gradually ventured into more conventional and radio-friendly works by incorporating further styles, such as arena rock and pop rock, into their music. Sharon Osbourne Management is a talent management company set up by Sharon Osbourne that manages acts in the entertainment industry.  Though mostly music acts, it has guided the careers of husband Ozzy Osbourne, children Kelly Osbourne and Jack Osbourne, as well as The Smashing Pumpkins, Coal Chamber, Queen, Gary Moore, Motörhead, Lita Ford, and ELO. Season seven of "America's Got Talent", a reality television series, premiered on May 14, 2012.  Sharon Osbourne and Howie Mandel returned as judges.  Judge Piers Morgan left the show after season six and was replaced by radio personality Howard Stern, as announced on his Sirius XM radio show on December 15, 2011.  Because of Stern's commitments to his radio program, the live (post-Las Vegas) episodes moved from Los Angeles to the New Jersey Performing Arts Center in Newark, New Jersey.  The season ended on September 13, 2012, with Olate Dogs announced as the winners of the season.  This was Sharon Osbourne's final season.
Answer: Queen