Question:
Simon Phillip Cowell was born on 7 October 1959 in Lambeth, London, and raised in Elstree, Hertfordshire. His mother, Julie Brett (nee Josie Dalglish; 1925-2015), was a ballet dancer and socialite, and his father, Eric Selig Phillip Cowell (1918-1999), was an estate agent, property developer, and music industry executive. Cowell's paternal grandmother was a Polish immigrant. His father was from a mostly Jewish family, though he did not discuss his background with his children, and his mother was from a Christian background.
In 2001, Cowell was given the role of judge on the first series of Pop Idol, a show that he and the show creator Simon Fuller successfully pitched to ITV Controller of Entertainment Claudia Rosencrantz. Cowell's S Records signed the top two finishers of the first season of Pop Idol, Will Young and Gareth Gates, both of whom went on to have No 1 UK hits, which were the top 2 best-selling singles of 2002, as well as that of top 2 of the decade of 2000s. He also became a judge on the first season of American Idol in 2002. With his notoriously critical reputation, Cowell has been likened to TV personalities such as Judith Sheindlin, and Anne Robinson of her show. Cowell's prominence grew, fed by his signature phrase, "I don't mean to be rude, but ...", inevitably followed by an unsparingly blunt appraisal of the contestant's talents, personality, or even physical appearance. A lot of these one-liners were the product of coaching that Cowell received from noted publicist Max Clifford (who was sacked by Cowell after being convicted of sex offences as of May 2014). Cowell also appeared on the one-off World Idol programme in 2003, where it became clear that each country's version of the Idol had attempted to come up with its own "Simon Cowell" type personality. In 2003, Cowell placed No 33 on Channel 4's list of the all-time 100 Worst Britons. Cowell formed a new company Syco, which is divided into three units - Syco Music, Syco TV and Syco Film. Cowell returned to music with his latest brainchild signed to Syco, the internationally successful operatic pop group Il Divo, consisting of three opera singers and one pop singer of four different nationalities. Inspired by the success of Il Divo, Simon created a child version, Angelis, beating competition from similar groups emerging at Christmas 2006. On 11 January 2010, Cowell's exit from American Idol was made official. By the time Cowell left American Idol, the show was on its seventh consecutive season in its leadership among all primetime programmes in the United States, even lasting up to 2011 in the longest winning streak in the US overall viewership and demographics in the Nielsen ratings. The 2010 season was Cowell's last on the show. He was replaced by Steven Tyler. It was also announced that FOX had acquired the rights to The X Factor USA, an American version of Cowell's British show, The X Factor, which began in September 2011.
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who else has he worked with within the franchise

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Answer the question at the end by quoting:

O-Town is an American boy band formed from the first season of the MTV-produced reality television series Making the Band in 2000. As of 2015 the group consists of Erik-Michael Estrada, Trevor Penick, Jacob Underwood, and Dan Miller. The most popular line up also included Ashley Parker Angel, who refused to participate in the 2013 reunion. Ikaika Kahoano was originally part of the band but replaced by Miller after dropping out of the group.
The members of O-Town moved on to solo careers. The most successful member of the group has been Ashley Parker Angel, who was signed to Universal's Blackground Records, and also given his own reality show on MTV, There and Back. Released in 2006, Ashley's solo debut album was heavily promoted, but did not achieve solid sales numbers. In January 2007, he began playing the role of Link Larkin in the Broadway production of Hairspray. Ex-bandmate, Trevor Penick, now professionally known as "Tre Scott", was signed to Mach 1 Music, and worked with established industry producer Eddie Galan. The other band members retained a fanbase and had success in their own right, as evidenced by their Myspace profiles. Erik stayed in the music business and went on to collaborate and co-write songs for other artists. Jacob Underwood went on to start his own country band "Jacobs Loc". Back in January 2011, rumors were swirling that a reunion was in the works for the band. TMZ reported that Erik, Trevor, Dan & Jacob have returned to the studio to record the follow-up to O2, however, it was confirmed that Ashley Parker Angel declined the offer from the guys. He told TMZ in a following article his explanation. "O-Town was one of the greatest chapters of my life, so when the idea of a reunion was brought to me, of course I was intrigued. However I have made the decision not to be a part of an O-Town reunion. It was a difficult decision, but ultimately necessary to move on with the next chapter of my career." He has, however, given the guys his blessing for them to reunite without him. When interviewed about his rejection, Erik said that the guys eventually come to terms with it, but admitted "I would just think he would want to come on board and be a part of it ... but he doesn't and that's cool." The remaining guys continued to pursue the reunion over the next few years, keeping details very private.

Who in the group had a solo career?
The most successful member of the group has been Ashley Parker Angel, who was signed to Universal's Blackground Records,