Question: Kerry McGregor, was a Scottish singer-songwriter and actress from West Lothian, she climbed to national fame after appearing on the third UK series of The X Factor, where she was mentored by Sharon Osbourne, an English television host, media personality, television talent competition judge, author, music manager, modern impresario, businesswoman, and promoter, and the wife of which heavy metal singer-songwriter?
Context: Kerry McGregor (30 October 1974 – 4 January 2012) was a Scottish singer-songwriter and actress from West Lothian.  McGregor climbed to national fame after appearing on the third UK series of The X Factor, where she was mentored by Sharon Osbourne.  McGregor died on 4 January 2012 of complications from bladder cancer, a disease she had suffered from for years. The X Factor was an Australian television reality music competition, based on the original UK series, to find new singing talent; the winner of which received a Sony Music Australia recording contract.  The eighth and final season, branded as X Factor: Next Generation, premiered on Seven Network on 3 October 2016.  Jason Dundas replaced Luke Jacobz as host; with the judging panel consisting of Guy Sebastian, Iggy Azalea, Adam Lambert and Mel B.  The winner was Isaiah Firebrace and his winner's single "It's Gotta Be You" was released after the final.  He was mentored by Lambert, who won as mentor for the first time. Simon Phillip Cowell ( ) (born 7 October 1959) is an English reality television judge and producer, entrepreneur, and philanthropist.  He is most recognised as a judge on the British TV talent competition series "Pop Idol", "The X Factor", and "Britain's Got Talent", and the American TV talent competition shows "American Idol", "The X Factor," and "America's Got Talent".  Cowell is the principal founder and chief executive of the British entertainment company Syco. Sharon Rachel Osbourne ( Levy; born 9 October 1952) is an English television host, media personality, television talent competition judge, author, music manager, modern impresario, businesswoman, and promoter, and the wife of heavy metal singer-songwriter Ozzy Osbourne.  She first came into public prominence after appearing in "The Osbournes", a reality television show that followed her family's daily life.  Osbourne later became a talent show judge on shows such as the British and original version of "The X Factor", from 2004 to 2007, 2013, and 2016 onwards.  She also was a judge on "America's Got Talent" from 2007 until 2012. The X Factor is a British television music competition to find new singing talent.  The thirteenth series began airing on ITV on 27 August 2016 and ended on 11 December 2016.  Dermot O'Leary returned to present the main show on ITV for the ninth time, after having quit the previous year.  Simon Cowell was the only judge from the 12th series to return; Nicole Scherzinger, Sharon Osbourne and Louis Walsh all returned, replacing Cheryl Fernandez-Versini, Rita Ora and Nick Grimshaw.  Matt Edmondson and Rylan Clark-Neal replaced Rochelle Humes and Melvin Odoom as hosts of "The Xtra Factor", which was rebranded as "The Xtra Factor Live" and was broadcast live twice every week, with Roman Kemp making appearances as a digital presenter and social media reporter.  Matt Terry was announced the winner on 11 December 2016, making Scherzinger the winning mentor for the second time.  Saara Aalto came second. The X Factor is a British television music competition to find new singing talent.  The eleventh series began airing on ITV on 30 August 2014 and finished on 14 December 2014.  Dermot O'Leary presented his eighth series of the main show on ITV and Sarah-Jane Crawford presented spin-off show "The Xtra Factor" on ITV2, replacing Caroline Flack and Matt Richardson.  Louis Walsh was the only judge from series 10 to return and was joined by former judges Simon Cowell, and Cheryl Fernandez-Versini, and new judge Mel B.  Sharon Osbourne, Gary Barlow and Nicole Scherzinger left after series 10.  Former judge Tulisa returned as a guest judge for the final on 13 December due to Mel B being ill.  The series also saw the lower age limit decreased from 16 to 14, as it was in series 4 and 5.  This was Walsh's final series as a judge before returning in series 13.  It was also the only series in which Mel B was a main judge.  It was O'Leary's final series as presenter on the main show, as he announced on 27 March 2015 that he was leaving to pursue other projects, before returning in series 13.  On 11 May, Crawford also confirmed via Twitter that she would leave her position as "The Xtra Factor" presenter. The second UK series of The X Factor ran from 20 August 2005 to 17 December 2005 with the same judges from the first series: Simon Cowell, Sharon Osbourne and Louis Walsh.  The series attracted 75,000 people to auditions.  Shayne Ward, mentored by Walsh, was declared the winner. The third UK series of "The X Factor" was broadcast on ITV between 19 August and 16 December 2006, with Simon Cowell, Sharon Osbourne and Louis Walsh mentoring and judging the finalists. The X Factor is a British television music competition to find new singing talent.  The third series was broadcast on ITV from 19 August 2006 until 16 December 2006.  Louis Walsh, Sharon Osbourne and Simon Cowell all returned for their third series on the judging panel.  Kate Thornton returned to present the main show on ITV, while Ben Shephard returned to present spin-off show "The Xtra Factor" on ITV2.  After the semi-final on 9 December, Cowell became the winning judge even though the series had not yet finished, as two of his acts, Ray Quinn and Leona Lewis, became the two finalists.  Lewis won the series on 16 December, with Quinn finishing as runner-up. 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.
Answer: Ozzy Osbourne